WPF Restrict pasting text in a textbox

Use the DataObject's Pasting handler to avoid pasting text into a textbox

XAML:
<TextBox x:Name="PasteRestrictedTextBox" DataObject.Pasting="PasteRestrictedTextBox_Pasting" />

CODE:
private void PasteRestrictedTextBox_Pasting(object sender, DataObjectPastingEventArgs e)
{
       e.CancelCommand();
}