Selects all text in the text box.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
This method enables you to select all text within the control. You can use this method with the Cut method, which requires text to be selected in the control, to cut the entire contents of the control and paste them into the Clipboard.
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.