### Generate a Simple PDF

Source: https://github.com/pdf4dev-solutions/pdf4net/blob/master/README.md

This snippet demonstrates how to create a new PDF document, add a page, draw text on it, and save the document. It uses basic PDF4NET classes for document creation and drawing.

```csharp
PDFFixedDocument document = new PDFFixedDocument();
PDFPage page = document.Pages.Add();
page.Canvas.DrawString("Hello PDF", new PDFStandardFont(), new PDFBrush(), 50, 50);
document.Save("HelloPDF.pdf");
```

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

### Upgrade PDFDocument Initialization

Source: https://github.com/pdf4dev-solutions/pdf4net/blob/master/Upgrade/readme.md

Replace the PDFDocument constructor from v5 with the PDFFixedDocument constructor for v10.

```csharp
//PDF4NET v5: PDFDocument doc = new PDFDocument();
PDFFixedDocument doc = new PDFFixedDocument();
```

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