### DefaultUnDo.IUnDo.Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ValueUnDo_T_/DefaultUnDo.IUnDo.Description.md

Gets a description of what this IUnDo perform.

```APIDOC
## DefaultUnDo.IUnDo.Description Property

### Description
Gets a description of what this IUnDo perform.

### Signature
```csharp
object? DefaultUnDo.IUnDo.Description { get; }
```

### Implements
[Description](../IUnDo/Description.md 'DefaultUnDo.IUnDo.Description')
```

--------------------------------

### DefaultUnDo.IUnDo.Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/DefaultUnDo.IUnDo.Description.md

Gets a description of what this IUnDo performs.

```APIDOC
## DefaultUnDo.IUnDo.Description Property

### Description
Gets a description of what this IUnDo performs.

### Signature
```csharp
object? DefaultUnDo.IUnDo.Description { get; }
```

### Implements
Implements [Description](../IUnDo/Description.md 'DefaultUnDo.IUnDo.Description')
```

--------------------------------

### DefaultUnDo.IUnDo.Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/CollectionUnDo_T_/DefaultUnDo.IUnDo.Description.md

Gets a description of what this IUnDo performs.

```APIDOC
## DefaultUnDo.IUnDo.Description Property

### Description
Gets a description of what this [IUnDo](../IUnDo/index.md 'DefaultUnDo.IUnDo') perform.

### Property
`object? DefaultUnDo.IUnDo.Description { get; }`

Implements [Description](../IUnDo/Description.md 'DefaultUnDo.IUnDo.Description')
```

--------------------------------

### IUnDo.Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IUnDo/Description.md

Gets a description of what this IUnDo performs.

```APIDOC
## IUnDo.Description Property

### Description
Gets a description of what this IUnDo performs.

### Property Type
object? (System.Object)

### Access
get
```

--------------------------------

### IUnDo.Description Property Implementation

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/index.md

Gets a description of the action performed by this GroupUnDo instance.

```csharp
object IUnDo.Description { get; }
```

--------------------------------

### DefaultUnDo.IUnDo.Description Property

Source: https://github.com/doraku/defaultundo/blob/master/documentation/DefaultUnDo.txt

Gets a description of the undo operation.

```APIDOC
## DefaultUnDo.IUnDo.Description

### Description
Gets a human-readable description of the undo operation.

### Property Type
string
```

--------------------------------

### DefaultUnDo.GroupUnDo.Description (Explicit Interface Implementation)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/index.md

Gets a description of the action performed by this IUnDo operation.

```APIDOC
## DefaultUnDo.IUnDo.Description Property

### Description
Gets a description of what this IUnDo performs.

### Method
Explicit Interface Implementation

### Endpoint
N/A (Property access within the GroupUnDo class)
```

--------------------------------

### UnDoManager.UndoDescriptions

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDoManager/UndoDescriptions.md

Gets the descriptions in order of all the IUnDo which can be undone.

```APIDOC
## UnDoManager.UndoDescriptions Property

### Description
Gets the descriptions in order of all the IUnDo which can be undone.

### Property Value
System.Collections.Generic.IEnumerable<object?> - An enumerable collection of objects representing the undo descriptions.
```

--------------------------------

### Setting a Field Value with Undo

Source: https://github.com/doraku/defaultundo/blob/master/README.md

Demonstrates how to record a field value change using the Do method, providing the new value, the undo action, and the current value. This example also includes an abstract base class for MVVM properties with undo support.

```csharp
IUnDoManager manager = new UnDoManager();

int field = 42;

manager.Do(v => field = v, 1337, field);

// In mvvm we all have some kind of base type
public abstract class ANotifyPropertyChanged : INotifyPropertyChanged
{
    private sealed class UnDoProperty<T> : UnDoField<T>
    {
        private readonly ANotifyPropertyChanged _parent;
        private readonly string _propertyName;

        public UnDoProperty(ANotifyPropertyChanged parent, IUnDoManager unDoManager, string propertyName)
            : base(unDoManager, _ => $
```

--------------------------------

### UnDoManager.Version Property

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDoManager/Version.md

Gets an System.Int32 representing the state of the IUnDoManager.

```APIDOC
## UnDoManager.Version Property

### Description
Gets an System.Int32 representing the state of the IUnDoManager.

### Property Value
System.Int32
```

--------------------------------

### IUnDoManager.RedoDescriptions

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IUnDoManager/RedoDescriptions.md

Gets the descriptions in order of all the IUnDo which can be redone.

```APIDOC
## IUnDoManager.RedoDescriptions Property

### Description
Gets the descriptions in order of all the IUnDo which can be redone.

### Property Value
System.Collections.Generic.IEnumerable<object?> - A collection of objects representing the redoable descriptions.
```

--------------------------------

### UnDoManager Class

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/index.md

Manages undo and redo operations using the command pattern. Allows for starting transactions, executing commands, and querying the state of undo/redo history.

```APIDOC
## UnDoManager Constructors

### Description
Initializes an instance of the UnDoManager class.

### Method
UnDoManager()
UnDoManager(int)

### Endpoint
Not applicable (SDK constructor)

## UnDoManager Properties

### Description
Provides access to the undo/redo state and descriptions.

### Properties
- **CanRedo** (boolean) - Returns a boolean to express if the Redo() method can be executed.
- **CanUndo** (boolean) - Returns a boolean to express if the Undo() method can be executed.
- **RedoDescriptions** (List<string>) - Gets the descriptions in order of all the IUnDo which can be redone.
- **UndoDescriptions** (List<string>) - Gets the descriptions in order of all the IUnDo which can be undone.
- **Version** (System.Int32) - Gets an integer representing the state of the IUnDoManager.

### Endpoint
Not applicable (SDK properties)

## UnDoManager Methods

### Description
Provides methods to control the undo/redo history, including starting transactions, executing operations, and clearing history.

### Methods
- **BeginTransaction(object)**: Starts a group of operations and returns an IUnDoTransaction to stop the group. If Commit() is not called, all operations done during the transaction will be undone on System.IDisposable.Dispose().
- **Clear()**: Clears the history of IUnDo operations.
- **Do(IUnDo)**: Executes the IUnDo command and stores it in the manager history.
- **Redo()**: Redoes the last undone IUnDo command of the manager history.
- **Undo()**: Undoes the last executed IUnDo command of the manager history.

### Endpoint
Not applicable (SDK methods)

## UnDoManager Events

### Description
Notifies when a property value changes.

### Event
- **PropertyChanged**: Occurs when a property value changes.

### Endpoint
Not applicable (SDK event)
```

--------------------------------

### TryGetSingle<T>(out T command)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/TryGetSingle_T_(T).md

Gets the single T of this instance. Returns true if the instance contains exactly one T, otherwise false.

```APIDOC
## TryGetSingle<T>(out T command)

### Description
Attempts to retrieve a single command of type T from the GroupUnDo instance. This method is useful for checking if the group contains only one command of a specific type and retrieving it if so.

### Method
```csharp
public bool TryGetSingle<T>(out T command)
    where T : class, DefaultUnDo.IUnDo;
```

### Parameters
#### Type Parameters
- `T`: The type of IUnDo to get.

#### Output Parameters
- `command` (T) - When this method returns, contains the single T of this instance if it was its only command; otherwise, the default value for the type T. This parameter is passed uninitialized.

### Returns
(System.Boolean) - true if the current instance contains exactly one T; otherwise false.
```

--------------------------------

### UnDoManager.RedoDescriptions Property

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDoManager/RedoDescriptions.md

Gets the descriptions in order of all the IUnDo which can be redone. This property returns a collection of objects representing redoable descriptions.

```csharp
public System.Collections.Generic.IEnumerable<object?> RedoDescriptions { get; }
```

--------------------------------

### GroupUnDo.MergeDescriptionAction Property

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/index.md

Gets the handler used to merge descriptions between GroupUnDo and IMergeableUnDo instances.

```csharp
public MergeDescriptionHandler<object, object, object> MergeDescriptionAction { get; }
```

--------------------------------

### GroupUnDo Constructor with Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/GroupUnDo.md

Initializes a GroupUnDo instance with a description and a span of IUnDo commands. Ensure the commands span does not contain null elements.

```csharp
public GroupUnDo(object? description, scoped System.ReadOnlySpan<DefaultUnDo.IUnDo> commands);
```

--------------------------------

### GroupUnDo Constructor with Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/index.md

Initializes a new instance of the GroupUnDo class with a description and a collection of IUnDo operations.

```csharp
public GroupUnDo(object description, ReadOnlySpan<IUnDo> operations)
```

--------------------------------

### UnDo Constructor with Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDo/UnDo.md

Initializes an UnDo instance with a description, a do action, and an undo action. Use this when you need to associate a descriptive text with the undoable operation.

```csharp
public UnDo(object? description, System.Action? doAction, System.Action? undoAction);
```

--------------------------------

### UnDo(object, Action, Action)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDo/UnDo.md

Initializes an instance of UnDo with a description, a do action, and an undo action.

```APIDOC
## UnDo(object, Action, Action) Constructor

### Description
Initializes an instance of [UnDo](index.md 'DefaultUnDo.UnDo') with a description, a do action, and an undo action.

### Parameters
#### Parameters
- **description** (System.Object) - The description of this [IUnDo](../IUnDo/index.md 'DefaultUnDo.IUnDo')
- **doAction** (System.Action) - The action called by [Do()](../IUnDo/Do().md 'DefaultUnDo.IUnDo.Do()').
- **undoAction** (System.Action) - The action called by [Undo()](../IUnDo/Undo().md 'DefaultUnDo.IUnDo.Undo()').
```

--------------------------------

### ValueUnDo<T> Constructors

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ValueUnDo_T_/index.md

Initializes an instance of ValueUnDo<T>.

```APIDOC
## ValueUnDo<T> Constructors

### ValueUnDo(object, Action<T>, T, T)

Initializes an instance of ValueUnDo<T>.

### ValueUnDo(Action<T>, T, T)

Initializes an instance of ValueUnDo<T>.
```

--------------------------------

### ValueUnDo(object, Action<T>, T, T)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ValueUnDo_T_/ValueUnDo_T_.md

Initializes an instance of ValueUnDo<T> with a description, a setter action, a new value, and an old value.

```APIDOC
## ValueUnDo(object, Action<T>, T, T) Constructor

Initializes an instance of [ValueUnDo<T>](../index.md 'DefaultUnDo.ValueUnDo<T>')

```csharp
public ValueUnDo(object? description, System.Action<T> setter, T newValue, T oldValue);
```

#### Parameters

- **description** (System.Object) - The description of this [IUnDo](../IUnDo/index.md 'DefaultUnDo.IUnDo')
- **setter** (System.Action<T>) - The action called to set the value.
- **newValue** (T) - The new value.
- **oldValue** (T) - The old value.

#### Exceptions

- System.ArgumentNullException - setter is null.
```

--------------------------------

### GroupUnDo Constructor with Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/GroupUnDo.md

Initializes a new instance of the GroupUnDo class with a description and a span of IUnDo commands.

```APIDOC
## GroupUnDo(object, ReadOnlySpan<IUnDo>) Constructor

### Description
Initializes a new instance of the [GroupUnDo](index.md 'DefaultUnDo.GroupUnDo') class.

### Parameters
#### Parameters
- **description** (System.Object) - The description of this [IUnDo](../IUnDo/index.md 'DefaultUnDo.IUnDo')
- **commands** (System.ReadOnlySpan<IUnDo>) - The sequence of [IUnDo](../IUnDo/index.md 'DefaultUnDo.IUnDo') contained by the instance.

#### Exceptions
- System.ArgumentException - 'commands' contains null elements.
```

--------------------------------

### IUnDoManager.UndoDescriptions

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IUnDoManager/UndoDescriptions.md

Gets the descriptions in order of all the IUnDo which can be undone.

```APIDOC
## IUnDoManager.UndoDescriptions Property

### Description
Gets the descriptions in order of all the IUnDo which can be undone.

### Property Value
System.Collections.Generic.IEnumerable<object?> - An enumerable collection of objects representing undoable actions.
```

--------------------------------

### ValueUnDo Constructor with Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ValueUnDo_T_/ValueUnDo_T_.md

Initializes a ValueUnDo<T> instance with an optional description, a setter action, the new value, and the old value. The setter action is invoked to apply the value change.

```csharp
public ValueUnDo(object? description, System.Action<T> setter, T newValue, T oldValue);
```

--------------------------------

### Basic Undo/Redo Manager Usage

Source: https://github.com/doraku/defaultundo/blob/master/README.md

Instantiate an UnDoManager and use its Do, Undo, Redo, and Clear methods to manage actions. Check CanUndo and CanRedo before performing operations.

```csharp
IUnDoManager manager = new UnDoManager();

// do an action and record it in the manager, undoAction being the undo equivalent of the action
manager.Do(doAction, undoAction);

if (manager.CanUndo)
{
    manager.Undo();
}

if (Manager.CanRedo)
{
    manager.Redo();
}

// clean any recorded action
manager.Clear();
```

--------------------------------

### IUnDoManager.Version

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IUnDoManager/Version.md

Gets an integer representing the state of the IUnDoManager.

```APIDOC
## IUnDoManager.Version Property

### Description
Gets an integer representing the current state of the IUnDoManager.

### Property
`Version`

### Return Value
- **Version** (int) - An integer representing the state of the IUnDoManager.
```

--------------------------------

### DictionaryUnDo Constructor with Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/DictionaryUnDo_TKey,TValue_/DictionaryUnDo_TKey,TValue_.md

Initializes a new instance of DictionaryUnDo<TKey, TValue> with an optional description. Use this constructor when you need to provide a descriptive label for the undoable operation. The 'isAdd' parameter determines if the operation is an add or remove action.

```csharp
public DictionaryUnDo(object? description, System.Collections.Generic.IDictionary<TKey,TValue> source, TKey key, TValue value, bool isAdd);
```

--------------------------------

### ListUnDo Constructor with Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ListUnDo_T_/ListUnDo_T_.md

Initializes a ListUnDo<T> instance with a description, source list, index, item, and operation type. Use this when an explicit description for the undo operation is needed.

```csharp
public ListUnDo(object? description, System.Collections.Generic.IList<T> source, int index, T item, bool isAdd);
```

--------------------------------

### DefaultUnDo.GroupUnDo.MergeDescriptionAction

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/index.md

Gets the handler used to merge descriptions between GroupUnDo and IMergeableUnDo instances.

```APIDOC
## MergeDescriptionAction Property

### Description
Gets the handler used to merge description between a GroupUnDo and a IMergeableUnDo instances.

### Method
Property Access

### Endpoint
N/A (Property access within the GroupUnDo class)
```

--------------------------------

### Get IUnDoManager Version

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IUnDoManager/Version.md

Retrieves the current version of the IUnDoManager. This property is read-only.

```csharp
int Version { get; }
```

--------------------------------

### UnDo(Action, Action)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDo/UnDo.md

Initializes an instance of UnDo with a do action and an undo action.

```APIDOC
## UnDo(Action, Action) Constructor

### Description
Initializes an instance of [UnDo](index.md 'DefaultUnDo.UnDo') with a do action and an undo action.

### Parameters
#### Parameters
- **doAction** (System.Action) - The action called by [Do()](../IUnDo/Do().md 'DefaultUnDo.IUnDo.Do()').
- **undoAction** (System.Action) - The action called by [Undo()](../IUnDo/Undo().md 'DefaultUnDo.IUnDo.Undo()').
```

--------------------------------

### ValueUnDo(Action<T>, T, T)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ValueUnDo_T_/ValueUnDo_T_.md

Initializes an instance of ValueUnDo<T> with a setter action, a new value, and an old value.

```APIDOC
## ValueUnDo(Action<T>, T, T) Constructor

Initialises an instance of [ValueUnDo<T>](../index.md 'DefaultUnDo.ValueUnDo<T>')

```csharp
public ValueUnDo(System.Action<T> setter, T newValue, T oldValue);
```

#### Parameters

- **setter** (System.Action<T>) - The action called to set the value.
- **newValue** (T) - The new value.
- **oldValue** (T) - The old value.

#### Exceptions

- System.ArgumentNullException - setter is null.
```

--------------------------------

### CollectionUnDo Constructor with Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/CollectionUnDo_T_/CollectionUnDo_T_.md

Initializes a new instance of the CollectionUnDo<T> class with a description, source collection, item, and operation type. Use this overload when you need to provide a descriptive label for the undo operation.

```csharp
public CollectionUnDo(object? description, System.Collections.Generic.ICollection<T> source, T item, bool isAdd);
```

--------------------------------

### UnDoField<T>.Value

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDoField_T_/Value.md

Gets or sets the value of the field, generating an IUnDo operation on set.

```APIDOC
## UnDoField<T>.Value Property

### Description
Gets or sets the value of the field. Setting the value generates an [IUnDo](../IUnDo/index.md 'DefaultUnDo.IUnDo') operation.

### Property Value
[T](index.md#DefaultUnDo.UnDoField_T_.T 'DefaultUnDo.UnDoField<T>.T') - The value of the field.
```

--------------------------------

### ValueUnDo.MergeDescriptionHandler

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ValueUnDo/MergeDescriptionHandler(object,object)/index.md

Represents a method that will be called when merging two ValueUnDo<T> instances to get the resulting description.

```APIDOC
## ValueUnDo.MergeDescriptionHandler(object, object)

### Description
Represents a method that will be called when merging two ValueUnDo<T> instances to get the resulting description.

### Method Signature
`public delegate object? ValueUnDo.MergeDescriptionHandler(object? oldDescription, object? newDescription);`

### Parameters
#### oldDescription
- **oldDescription** (object) - The description of the previous ValueUnDo<T> merged.

#### newDescription
- **newDescription** (object) - The description of the new ValueUnDo<T> merged.

### Returns
- **object** - The merged description.
```

--------------------------------

### GroupUnDo.MergeDescriptionHandler

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/MergeDescriptionHandler(object,object,object)/index.md

Represents a method that will be called when merging a GroupUnDo and a IMergeableUnDo instances to get the resulting description.

```APIDOC
## GroupUnDo.MergeDescriptionHandler(object, object, object)

### Description
Represents a method that will be called when merging a GroupUnDo and a IMergeableUnDo instances to get the resulting description.

### Method Signature
`public delegate object GroupUnDo.MergeDescriptionHandler(object? oldDescription, object? newDescription, object? mergedDescription);`

### Parameters
#### Parameters
- **oldDescription** (System.Object) - The description of the previous GroupUnDo merged.
- **newDescription** (System.Object) - The description of the new IMergeableUnDo merged.
- **mergedDescription** (System.Object) - The description of the new resulting IMergeableUnDo merged.

### Returns
- **System.Object** - The final description to use.
```

--------------------------------

### Basic Undo/Redo Operation

Source: https://github.com/doraku/defaultundo/blob/master/README.md

Demonstrates a simple undo and redo operation using the IUnDoManager.

```csharp
manager.Redo();
```

--------------------------------

### CollectionUnDo<T> Constructors

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/CollectionUnDo_T_/index.md

Initializes an instance of the CollectionUnDo<T> class.

```APIDOC
## CollectionUnDo<T> Constructors

### Description
Initializes an instance of the CollectionUnDo<T> class.

### Constructors

- **CollectionUnDo(object, ICollection<T>, T, bool)**: Initializes an instance of CollectionUnDo<T>.
- **CollectionUnDo(ICollection<T>, T, bool)**: Initializes an instance of CollectionUnDo<T>.
```

--------------------------------

### ValueUnDo.MergeInterval

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ValueUnDo/MergeInterval.md

Gets or sets the TimeSpan interval that ValueUnDo instances should respect to be mergeable. The default value is 500ms.

```APIDOC
## ValueUnDo.MergeInterval Property

### Description

Gets or sets the `System.TimeSpan` interval that `ValueUnDo<T>` instances should respect to be mergeable. This property determines the time window within which consecutive undo operations can be merged into a single undo action.

### Property Value

`System.TimeSpan` - The interval for merging undo operations. The default value is 500 milliseconds.
```

--------------------------------

### DictionaryUnDo Constructors

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/DictionaryUnDo_TKey,TValue_/index.md

Initializes a new instance of the DictionaryUnDo<TKey, TValue> class.

```APIDOC
## DictionaryUnDo<TKey, TValue> Constructors

### Description
Initializes a new instance of the DictionaryUnDo<TKey, TValue> class.

### Constructors

- **DictionaryUnDo(object, IDictionary<TKey, TValue>, TKey, TValue, bool)**: Initializes an instance of DictionaryUnDo<TKey, TValue>.
- **DictionaryUnDo(IDictionary<TKey, TValue>, TKey, TValue, bool)**: Initializes an instance of DictionaryUnDo<TKey, TValue>.
```

--------------------------------

### ValueUnDo.MergeInterval Property

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ValueUnDo/MergeInterval.md

Gets or sets the TimeSpan interval for merging ValueUnDo instances. The default value is 500ms.

```csharp
public static System.TimeSpan MergeInterval { get; set; }
```

--------------------------------

### DefaultUnDo.ValueUnDo.MergeDescriptionHandler(object, object)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/index.md

Represents a method that will be called when merging two ValueUnDo<T> instances to get the resulting description.

```APIDOC
## DefaultUnDo.ValueUnDo.MergeDescriptionHandler(object, object)

### Description
Represents a method that will be called when merging two ValueUnDo<T> instances to get the resulting description.

### Method
Delegate

### Parameters
This method takes two object parameters, representing the values to be merged for description.

### Response
This delegate is expected to return a description of the merged value.
```

--------------------------------

### GroupUnDo Constructor without Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/GroupUnDo.md

Initializes a new instance of the GroupUnDo class with a span of IUnDo commands.

```APIDOC
## GroupUnDo(ReadOnlySpan<IUnDo>) Constructor

### Description
Initializes a new instance of the [GroupUnDo](index.md 'DefaultUnDo.GroupUnDo') class.

### Parameters
#### Parameters
- **commands** (System.ReadOnlySpan<IUnDo>) - The sequence of [IUnDo](../IUnDo/index.md 'DefaultUnDo.IUnDo') contained by the instance.

#### Exceptions
- System.ArgumentNullException - 'commands' is null.
- System.ArgumentException - 'commands' contains null elements.
```

--------------------------------

### DefaultUnDo.ValueUnDo<T>.MergeDescriptionHandler(object, T, object, T)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/index.md

Represents a method that will be called when merging two ValueUnDo<T> instances to get the resulting description.

```APIDOC
## DefaultUnDo.ValueUnDo<T>.MergeDescriptionHandler(object, T, object, T)

### Description
Represents a method that will be called when merging two ValueUnDo<T> instances to get the resulting description.

### Method
Delegate

### Parameters
This method takes four parameters: two objects and two of type T, representing the values to be merged for description.

### Response
This delegate is expected to return a description of the merged value.
```

--------------------------------

### ValueUnDo<T>.MergeInterval Property

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ValueUnDo_T_/MergeInterval.md

Gets or sets the TimeSpan interval for merging ValueUnDo<T> instances. If not set, the default MergeInterval will be used.

```csharp
public static System.Nullable<System.TimeSpan> MergeInterval { get; set; }
```

--------------------------------

### BeginTransaction Method Signature

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDoManager/BeginTransaction(object).md

This is the signature for the BeginTransaction method. It takes an optional object description and returns an IUnDoTransaction.

```csharp
public DefaultUnDo.IUnDoTransaction BeginTransaction(object? description=null);
```

--------------------------------

### GroupUnDo Constructor without Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/index.md

Initializes a new instance of the GroupUnDo class with a collection of IUnDo operations.

```csharp
public GroupUnDo(ReadOnlySpan<IUnDo> operations)
```

--------------------------------

### CollectionUnDo(object, ICollection<T>, T, bool)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/CollectionUnDo_T_/CollectionUnDo_T_.md

Initializes an instance of CollectionUnDo<T> with a description, source collection, item, and operation type.

```APIDOC
## CollectionUnDo(object, ICollection<T>, T, bool)

### Description
Initializes an instance of CollectionUnDo<T>.

### Method
Constructor

### Parameters
#### Path Parameters
- **description** (object) - The description of this IUnDo.
- **source** (ICollection<T>) - The ICollection<T> on which to perform operation.
- **item** (T) - The argument of the operation.
- **isAdd** (bool) - true if the operation is an ICollection<T>.Add(@0), false for a ICollection<T>.Remove(@0).

#### Exceptions
- **ArgumentNullException**: source is null.
```

--------------------------------

### Get Undo Descriptions

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IUnDoManager/UndoDescriptions.md

Retrieves an enumerable collection of objects representing the descriptions of undoable actions managed by the IUnDoManager. This property is read-only.

```csharp
System.Collections.Generic.IEnumerable<object?> UndoDescriptions { get; }
```

--------------------------------

### GroupUnDo Constructor without Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/GroupUnDo.md

Initializes a GroupUnDo instance with a span of IUnDo commands. The commands span must not be null and should not contain null elements.

```csharp
public GroupUnDo(scoped System.ReadOnlySpan<DefaultUnDo.IUnDo> commands);
```

--------------------------------

### IUnDoManager.BeginTransaction(object)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IUnDoManager/BeginTransaction(object).md

Starts a group of operations and returns an IUnDoTransaction to stop the group. If Commit() is not called, all operations done during the transaction will be undone on System.IDisposable.Dispose.

```APIDOC
## IUnDoManager.BeginTransaction(object)

### Description
Starts a group of operations and returns an IUnDoTransaction to manage the transaction. If Commit() is not called, all operations done during the transaction will be undone on System.IDisposable.Dispose.

### Method
Not applicable (SDK method)

### Endpoint
Not applicable (SDK method)

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Request Example
```csharp
// Example usage:
// IUnDoTransaction transaction = undoManager.BeginTransaction("Perform some operations");
// try
// {
//     // Perform operations...
//     transaction.Commit();
// }
// catch
// {
//     // Transaction will be automatically rolled back by Dispose if not committed
// }
```

### Response
#### Success Response
- **IUnDoTransaction** - An IUnDoTransaction to commit or rollback the transaction of operations.

#### Response Example
```csharp
// The return type is an object implementing IUnDoTransaction
```

#### Parameters
- **description** (System.Object) - Optional - The description of the group of operations.
```

--------------------------------

### UnDo Constructor without Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDo/UnDo.md

Initializes an UnDo instance with only a do action and an undo action. This is suitable for operations where a textual description is not necessary.

```csharp
public UnDo(System.Action? doAction, System.Action? undoAction);
```

--------------------------------

### Redo() Method Signature

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IUnDoManager/Redo().md

This is the signature for the Redo() method. It does not take any parameters and returns void.

```csharp
void Redo();
```

--------------------------------

### UnDoField<T>.Value Property Signature

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDoField_T_/Value.md

This is the C# signature for the Value property of the UnDoField<T> class. It indicates that the property is public, can be accessed for getting and setting, and is generic with type T.

```csharp
public T Value { get; set; }
```

--------------------------------

### ListUnDo(object, IList<T>, int, T, bool)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ListUnDo_T_/ListUnDo_T_.md

Initializes an instance of ListUnDo<T> with a description, source list, index, item, and a boolean indicating if it's an add operation.

```APIDOC
## ListUnDo(object, IList<T>, int, T, bool)

### Description
Initializes an instance of ListUnDo<T>.

### Method
Constructor

### Parameters
#### Parameters
- **description** (System.Object) - Description of this IUnDo.
- **source** (System.Collections.Generic.IList<T>) - The IList<T> on which the operation is performed.
- **index** (System.Int32) - The index of the operation.
- **item** (T) - The argument of the operation.
- **isAdd** (System.Boolean) - true if the operation is an IList<T>.IndexOf(@0), else false for a IList<T>.RemoveAt(System.Int32).

#### Exceptions
- **System.ArgumentNullException**: source is null.
```

--------------------------------

### C# IUnDoManager.BeginTransaction Method Signature

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IUnDoManager/BeginTransaction(object).md

This is the method signature for BeginTransaction. It starts a group of operations and returns an IUnDoTransaction to manage the group. If Commit() is not called, operations are undone on Dispose.

```csharp
DefaultUnDo.IUnDoTransaction BeginTransaction(object? description=null);
```

--------------------------------

### ValueUnDo<T>.MergeDescriptionHandler

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ValueUnDo_T_/MergeDescriptionHandler(object,T,object,T)/index.md

Represents a method that will be called when merging two ValueUnDo<T> instances to get the resulting description. It takes the old and new descriptions and values, and returns the merged description.

```APIDOC
## ValueUnDo<T>.MergeDescriptionHandler(object, T, object, T)

### Description
Represents a method that will be called when merging two ValueUnDo<T> instances to get the resulting description.

### Method Signature
`delegate object ValueUnDo<T>.MergeDescriptionHandler(object? oldDescription, T oldValue, object? newDescription, T newValue);`

### Parameters
#### Parameters
- **oldDescription** (System.Object) - The description of the previous ValueUnDo<T> merged.
- **oldValue** (T) - The old value used when undoing the resulting merged ValueUnDo<T>.
- **newDescription** (System.Object) - The description of the new ValueUnDo<T> merged.
- **newValue** (T) - The new value used when redoing the resulting merged ValueUnDo<T>.

### Returns
- **System.Object** - The new description that will be using for the resulting merged ValueUnDo<T>.
```

--------------------------------

### Default UnDoManager Constructor

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDoManager/UnDoManager.md

Initializes an instance of UnDoManager with default settings. Use this when no specific capacity limit is required.

```csharp
public UnDoManager();
```

--------------------------------

### DefaultUnDo.UnDo.DefaultUnDo#IUnDo#Undo

Source: https://github.com/doraku/defaultundo/blob/master/documentation/DefaultUnDo.txt

Executes the defined redo action.

```APIDOC
## DefaultUnDo.UnDo.DefaultUnDo#IUnDo#Undo()

### Description
Executes the action defined for the Undo operation.

### Method
Method
```

--------------------------------

### ValueUnDo<T> Constructors

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/index.md

Initializes an instance of ValueUnDo<T>, which provides an implementation of the IUnDo interface for setting values.

```APIDOC
## ValueUnDo<T> Constructors

### Description
Initializes an instance of ValueUnDo<T>.

### Constructors
- **ValueUnDo(object, Action<T>, T, T)**
- **ValueUnDo(Action<T>, T, T)**
```

--------------------------------

### Execute and Store IUnDo Command

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IUnDoManager/Do(IUnDo).md

Use this method to execute an IUnDo command and have it recorded in the manager's history. Ensure the command object is not null to avoid an ArgumentNullException.

```csharp
void Do(DefaultUnDo.IUnDo command);
```

--------------------------------

### C# - DoInsert<T> Method Signature

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IUnDoManagerExtensions/DoInsert_T_(thisIUnDoManager,IList_T_,int,T,object).md

This is the signature for the DoInsert<T> method. It takes an IUnDoManager, a generic IList, an index, the item to insert, and an optional description.

```csharp
public static void DoInsert<T>(this DefaultUnDo.IUnDoManager manager, System.Collections.Generic.IList<T> source, int index, T item, object? description=null);
```

--------------------------------

### DictionaryUnDo<TKey, TValue> Constructors

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/index.md

Initializes an instance of DictionaryUnDo<TKey, TValue>, which implements the IUnDo interface for IDictionary<TKey, TValue> operations.

```APIDOC
## DictionaryUnDo<TKey, TValue> Constructors

### Description
Initializes an instance of DictionaryUnDo<TKey, TValue>, which implements the IUnDo interface for IDictionary<TKey, TValue> operations.

### Constructors

- **DictionaryUnDo(object, IDictionary<TKey, TValue>, TKey, TValue, bool)**: Initializes an instance of DictionaryUnDo<TKey, TValue>.
- **DictionaryUnDo(IDictionary<TKey, TValue>, TKey, TValue, bool)**: Initializes an instance of DictionaryUnDo<TKey, TValue>.
```

--------------------------------

### DefaultUnDo.UnDo.DefaultUnDo#IUnDo#Do

Source: https://github.com/doraku/defaultundo/blob/master/documentation/DefaultUnDo.txt

Executes the defined undo action.

```APIDOC
## DefaultUnDo.UnDo.DefaultUnDo#IUnDo#Do()

### Description
Executes the action defined for the Do operation.

### Method
Method
```

--------------------------------

### ListUnDo Constructor without Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ListUnDo_T_/ListUnDo_T_.md

Initializes a ListUnDo<T> instance with the source list, index, item, and operation type. Use this for simpler undo operations where a separate description is not required.

```csharp
public ListUnDo(System.Collections.Generic.IList<T> source, int index, T item, bool isAdd);
```

--------------------------------

### DefaultUnDo.UnDo Constructor

Source: https://github.com/doraku/defaultundo/blob/master/documentation/DefaultUnDo.txt

Initializes a new instance of the UnDo class for basic undo/redo actions.

```APIDOC
## DefaultUnDo.UnDo.#ctor(System.Object,System.Action,System.Action)

### Description
Constructs an UnDo object with an owner and specific actions for undo and redo.

### Method
Constructor

### Parameters
* **owner** (object) - Required - The owner of the undo operation.
* **doAction** (Action) - Required - The action to perform when Do() is called.
* **undoAction** (Action) - Required - The action to perform when Undo() is called.
```

```APIDOC
## DefaultUnDo.UnDo.#ctor(System.Action,System.Action)

### Description
Constructs an UnDo object with specific actions for undo and redo.

### Method
Constructor

### Parameters
* **doAction** (Action) - Required - The action to perform when Do() is called.
* **undoAction** (Action) - Required - The action to perform when Undo() is called.
```

--------------------------------

### ValueUnDo Constructor without Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ValueUnDo_T_/ValueUnDo_T_.md

Initializes a ValueUnDo<T> instance with a setter action, the new value, and the old value. This overload is used when no specific description is needed for the undo operation.

```csharp
public ValueUnDo(System.Action<T> setter, T newValue, T oldValue);
```

--------------------------------

### GroupUnDo Constructors

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/index.md

Initializes a new instance of the GroupUnDo class.

```APIDOC
## GroupUnDo(object, ReadOnlySpan<IUnDo>)

### Description
Initializes an instance of GroupUnDo with a description and a span of IUnDo operations.

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Request Example
None

### Response
#### Success Response (200)
None

#### Response Example
None
```

```APIDOC
## GroupUnDo(ReadOnlySpan<IUnDo>)

### Description
Initializes an instance of GroupUnDo with a span of IUnDo operations.

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Request Example
None

### Response
#### Success Response (200)
None

#### Response Example
None
```

--------------------------------

### IUnDo Interface Methods

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IUnDo/index.md

This section details the methods available in the IUnDo interface.

```APIDOC
## IUnDo Interface

### Description
Provides methods to execute an action and remove its effect.

### Methods

#### Do()

##### Description
Does an action.

##### Method
(Implicitly called by the system or user)

#### Undo()

##### Description
Does the opposite of the Do() action.

##### Method
(Implicitly called by the system or user)

### Properties

#### Description

##### Description
Gets a description of what this IUnDo perform.

##### Property Type
string
```

--------------------------------

### CollectionUnDo(ICollection<T>, T, bool)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/CollectionUnDo_T_/CollectionUnDo_T_.md

Initializes an instance of CollectionUnDo<T> with a source collection, item, and operation type.

```APIDOC
## CollectionUnDo(ICollection<T>, T, bool)

### Description
Initializes an instance of CollectionUnDo<T>.

### Method
Constructor

### Parameters
#### Path Parameters
- **source** (ICollection<T>) - The ICollection<T> on which to perform operation.
- **item** (T) - The argument of the operation.
- **isAdd** (bool) - true if the operation is an ICollection<T>.Add(@0), false for a ICollection<T>.Remove(@0).

#### Exceptions
- **ArgumentNullException**: source is null.
```

--------------------------------

### DefaultUnDo.IUnDo.Do() Method Signature

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/CollectionUnDo_T_/DefaultUnDo.IUnDo.Do().md

This snippet shows the method signature for DefaultUnDo.IUnDo.Do(). It is a void method that performs an action.

```csharp
void DefaultUnDo.IUnDo.Do();
```

--------------------------------

### DictionaryUnDo Constructor Signature

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/DictionaryUnDo_TKey,TValue_/DictionaryUnDo_TKey,TValue_.md

Initializes an instance of DictionaryUnDo<TKey, TValue>. Use this constructor to set up an undoable operation on a dictionary.

```csharp
public DictionaryUnDo(System.Collections.Generic.IDictionary<TKey,TValue> source, TKey key, TValue value, bool isAdd);
```

--------------------------------

### DefaultUnDo.IUnDo.Do()

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/GroupUnDo/DefaultUnDo.IUnDo.Do().md

Performs an action. This method is part of the IUnDo interface.

```APIDOC
## DefaultUnDo.IUnDo.Do()

### Description
Does an action.

### Method
void

### Signature
void DefaultUnDo.IUnDo.Do()
```

--------------------------------

### DefaultUnDo.IUnDo.Do()

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/DictionaryUnDo_TKey,TValue_/DefaultUnDo.IUnDo.Do().md

Executes an action. This method is part of the IUnDo interface and is implemented by the DefaultUnDo class.

```APIDOC
## DefaultUnDo.IUnDo.Do()

### Description
Does an action.

### Method
void

### Endpoint
N/A (SDK Method)

### Implements
[Do()](../IUnDo/Do().md 'DefaultUnDo.IUnDo.Do()')
```

--------------------------------

### ListUnDo(IList<T>, int, T, bool)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ListUnDo_T_/ListUnDo_T_.md

Initializes an instance of ListUnDo<T> with a source list, index, item, and a boolean indicating if it's an add operation.

```APIDOC
## ListUnDo(IList<T>, int, T, bool)

### Description
Initializes an instance of ListUnDo<T>.

### Method
Constructor

### Parameters
#### Parameters
- **source** (System.Collections.Generic.IList<T>) - The IList<T> on which the operation is performed.
- **index** (System.Int32) - The index of the operation.
- **item** (T) - The argument of the operation.
- **isAdd** (System.Boolean) - true if the operation is an IList<T>.IndexOf(@0), else false for a IList<T>.RemoveAt(System.Int32).

#### Exceptions
- **System.ArgumentNullException**: source is null.
```

--------------------------------

### Do<T>

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/index.md

Sets a value as an IUnDo operation.

```APIDOC
## Do<T>

### Description
Sets a value as a IUnDo operation.

### Method
`Method`

### Endpoint
`DefaultUnDo/IUnDoManagerExtensions/Do<T>`

### Parameters
#### Path Parameters
- **this IUnDoManager** (IUnDoManager) - Required - The undo manager.
- **Action<T>** (Action<T>) - Required - The action to perform.
- **T** (T) - Required - The value to set.
- **T** (T) - Required - The value to undo.
- **object** (object) - Optional - A state object.

### Response
#### Success Response
- Completes the undo/redo operation.
```

--------------------------------

### UnDoManager() Constructor

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDoManager/UnDoManager.md

Initializes a new instance of the UnDoManager class with default capacity.

```APIDOC
## UnDoManager()

### Description
Initializes a new instance of the UnDoManager class.

### Method
Constructor

### Endpoint
N/A

### Parameters
None

### Request Example
None

### Response
Initializes an UnDoManager object.
```

--------------------------------

### ISetExtensions.AsUnDo<T>

Source: https://github.com/doraku/defaultundo/blob/master/documentation/DefaultUnDo.txt

Converts an ISet<T> to an IUnDo operation manager.

```APIDOC
## DefaultUnDo.ISetExtensions.AsUnDo<T>

### Description
Converts an ISet<T> to an IUnDo operation manager, allowing for undo/redo operations on the set.

### Method
Invoke

### Endpoint
N/A

### Parameters
- **this ISet<T>** (ISet<T>) - Required - The set to convert.
- **IUnDoManager** (IUnDoManager) - Required - The undo manager to use.
- **Func<UnDoCollectionOperation, object>** (Func<UnDoCollectionOperation, object>) - Required - A function to handle collection operations.

### Request Example
N/A

### Response
#### Success Response
- **IUnDo** (IUnDo) - The undo operation manager for the set.

#### Response Example
N/A
```

--------------------------------

### DictionaryUnDo<TKey, TValue> IUnDo Methods

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/index.md

Provides explicit interface implementations for the IUnDo interface methods (Description, Do, Undo) for the DictionaryUnDo<TKey, TValue> class.

```APIDOC
## DictionaryUnDo<TKey, TValue> IUnDo Methods

### Description
Provides explicit interface implementations for the IUnDo interface methods (Description, Do, Undo) for the DictionaryUnDo<TKey, TValue> class.

### Methods

- **DefaultUnDo.IUnDo.Description**: Gets a description of what this IUnDo performs.
- **DefaultUnDo.IUnDo.Do()**: Performs an action.
- **DefaultUnDo.IUnDo.Undo()**: Performs the opposite of the Do() action.
```

--------------------------------

### IListExtensions.AsUnDo<T> Method Signature

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/IListExtensions/AsUnDo_T_(thisIList_T_,IUnDoManager,Func_UnDoCollectionOperation,object_).md

This is the signature for the AsUnDo<T> extension method. It takes an IList<T>, an IUnDoManager, and an optional description factory as parameters.

```csharp
public static System.Collections.Generic.IList<T> AsUnDo<T>(this System.Collections.Generic.IList<T> source, DefaultUnDo.IUnDoManager manager, System.Func<DefaultUnDo.UnDoCollectionOperation,object?>? descriptionFactory=null);
```

--------------------------------

### DefaultUnDo.GroupUnDo.Do() (Explicit Interface Implementation)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/index.md

Executes the action represented by this IUnDo operation.

```APIDOC
## DefaultUnDo.IUnDo.Do() Method

### Description
Performs the action.

### Method
Explicit Interface Implementation

### Endpoint
N/A (Method call within the GroupUnDo class)
```

--------------------------------

### UnDoManager(int maxCapacity) Constructor

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDoManager/UnDoManager.md

Initializes a new instance of the UnDoManager class with a specified maximum capacity for undo operations.

```APIDOC
## UnDoManager(int maxCapacity)

### Description
Initializes a new instance of the UnDoManager class with a specified maximum capacity.

### Method
Constructor

### Endpoint
N/A

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Parameters
#### `maxCapacity`
- **maxCapacity** (System.Int32) - Required - The maximum number of operations this UnDoManager can record before erasing the oldest ones.

### Request Example
None

### Response
Initializes an UnDoManager object with the specified capacity.
```

--------------------------------

### Do(this IUnDoManager, Action, Action, object)

Source: https://github.com/doraku/defaultundo/blob/master/documentation/DefaultUnDo.txt

Records a compound undo/redo operation consisting of a do action and an undo action.

```APIDOC
## Do(this IUnDoManager, Action, Action, object)

### Description
Records a compound undo/redo operation consisting of a do action and an undo action.

### Method
Not specified (extension method)

### Endpoint
Not applicable (extension method)

### Parameters
#### Path Parameters
None

#### Query Parameters
None

#### Request Body
None

### Request Example
None

### Response
#### Success Response
None

#### Response Example
None
```

--------------------------------

### UnDoCollectionOperation Constructor

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDoCollectionOperation/UnDoCollectionOperation(object,UnDoCollectionAction,object[]).md

Initializes a new instance of the UnDoCollectionOperation class. Use this to provide details about an upcoming operation on an undo collection, including the collection itself, the action to be performed, and any associated parameters.

```csharp
public UnDoCollectionOperation(object Collection, DefaultUnDo.UnDoCollectionAction Action, params object?[] Parameters);
```

--------------------------------

### ValueUnDo.MergeDescriptionHandler Delegate Signature

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/ValueUnDo/MergeDescriptionHandler(object,object)/index.md

This is the signature for the ValueUnDo.MergeDescriptionHandler delegate. It takes two object parameters, representing the old and new descriptions, and returns an object representing the merged description.

```csharp
public delegate object? ValueUnDo.MergeDescriptionHandler(object? oldDescription, object? newDescription);
```

--------------------------------

### UnDoField Constructor with Initial Value and Description Factory

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/UnDoField_T_/UnDoField_T_.md

Creates an UnDoField instance with an initial value, an IUnDoManager, and an optional factory for generating descriptions of undo operations. The manager parameter is mandatory.

```csharp
public UnDoField(DefaultUnDo.IUnDoManager manager, T value, System.Func<DefaultUnDo.UnDoFieldChange<T>,object?>? descriptionFactory=null);
```

--------------------------------

### CollectionUnDo Constructor without Description

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/CollectionUnDo_T_/CollectionUnDo_T_.md

Initializes a new instance of the CollectionUnDo<T> class with a source collection, item, and operation type. This overload is suitable when a descriptive label for the undo operation is not required.

```csharp
public CollectionUnDo(System.Collections.Generic.ICollection<T> source, T item, bool isAdd);
```

--------------------------------

### Do<TKey,TValue>

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/index.md

Sets the element with the specified key on an IDictionary<TKey,TValue> as an IUnDo operation.

```APIDOC
## Do<TKey,TValue>

### Description
Sets the element with the specified key on an IDictionary<TKey,TValue> as an IUnDo operation.

### Method
`Method`

### Endpoint
`DefaultUnDo/IUnDoManagerExtensions/Do<TKey,TValue>`

### Parameters
#### Path Parameters
- **this IUnDoManager** (IUnDoManager) - Required - The undo manager.
- **IDictionary<TKey,TValue>** (IDictionary<TKey,TValue>) - Required - The dictionary to modify.
- **TKey** (TKey) - Required - The key of the element to set.
- **TValue** (TValue) - Required - The new value for the element.
- **object** (object) - Optional - A state object.

### Response
#### Success Response
- Completes the undo/redo operation.
```

--------------------------------

### DefaultUnDo.GroupUnDo.TryGetSingle

Source: https://github.com/doraku/defaultundo/blob/master/documentation/DefaultUnDo.txt

Attempts to retrieve a single IUnDo operation from the group if it contains only one.

```APIDOC
## DefaultUnDo.GroupUnDo.TryGetSingle<T>(T@)

### Description
Attempts to extract a single IUnDo operation from the group. Returns true if the group contains exactly one operation and it is of type T, otherwise returns false.

### Method
Method

### Parameters
* **@** (T) - Required - Output parameter to store the single operation if successful.
```

--------------------------------

### DefaultUnDo.IUnDo.Do()

Source: https://github.com/doraku/defaultundo/blob/master/documentation/api/DefaultUnDo/CollectionUnDo_T_/DefaultUnDo.IUnDo.Do().md

The Do() method is part of the IUnDo interface and is used to perform an action. It is implemented by the DefaultUnDo class.

```APIDOC
## DefaultUnDo.IUnDo.Do()

### Description
Performs an action. This method is part of the IUnDo interface.

### Method
void

### Signature
void DefaultUnDo.IUnDo.Do()

### Implements
[Do](../IUnDo/Do().md 'DefaultUnDo.IUnDo.Do()')
```