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TextBoxBase.CanUndo Property

Gets a value that indicates whether the most recent action can be undone.

Namespace:  System.Windows.Controls.Primitives
Assembly:  PresentationFramework (in PresentationFramework.dll)

public bool CanUndo { get; }

Property Value

Type: System.Boolean
true if the most recent action can be undone; otherwise, false.
This property has no default value.

The following code example demonstrates how to use the CanUndo property to determine whether the most recent action can be undone.

private void undoAction(object sender, RoutedEventArgs e)
{
    if (myTextBox.CanUndo == true)
    {
        myTextBox.Undo();
    }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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