You can then use the Redo method to reapply the last undo operation to the control. The CanRedo method enables you to determine whether the last operation the user has undone can be reapplied to the control.
The following code example demonstrates how to use the CanRedo and RedoActionName properties, and the Redo method, to restrict a redo operation to any action except the deletion of text. This example requires that you have a form that contains a RichTextBox control and that an operation within the RichTextBox has been performed and undone before the code in this example is called.
// Determines if a Redo operation can be performed. if(richTextBox1.CanRedo == true)
// Determines if the redo operation deletes text. if (richTextBox1.RedoActionName != "Delete")
// Perform the redo.
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)