The text to append to the current contents of the text box.
Remarks
You can use this method to add text to the existing text in the control instead of using the concatenation operator (+) to concatenate text to the TextBoxBase.Text property.
Requirements
Namespace: System.Windows.Forms Assembly: System.Windows.Forms (in System.Windows.Forms.dll) Assembly Versions: 1.0.5000.0, 2.0.0.0