# SaveFileDialogOptions.DefaultExtension property

The default file extension: the extension itself, without dots or wildcards. For XML files specify "xml", not "*.xml".

```csharp
public string? DefaultExtension { get; set; }
```

## See Also

* class [SaveFileDialogOptions](../SaveFileDialogOptions.md)
* namespace [Eremex.AvaloniaUI.Controls.ApplicationServices](../index.md)

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