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TextBox.SelectionStart Property

Gets or sets a character index for the beginning of the current selection.

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

member SelectionStart : int with get, set

<object SelectionStart="int" .../>

Property Value

Type: System.Int32
The character index for the beginning of the current selection.


SelectionStart is set to a negative value.

In cases where the specified selection length would cause the selection to end between a carriage return and a new-line character, the selection length is automatically increased by 1 so that the resulting selection spans the entire end-of-line marker.

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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