# OpenFileDialogOptions.Filter property

The file type filters, written as display name and patterns alternating and separated by `|`, where several patterns for one type are separated by `;` and each pattern is a glob such as `*.png` — for example `"Images|*.png;*.jpg|All files|*.*"`. When left unset, all files are shown.

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

## See Also

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

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