Retrieves the line number from the specified character position within the text of the control. This method is not supported by System.Windows.Forms.MaskedTextBox.
This method will always return 0.
The MaskedTextBox.GetLineFromCharIndex(int) method is inherited from the base System.Windows.Forms.TextBoxBase class. However, because the System.Windows.Forms.MaskedTextBox control does not support multiline configuration, this method is not supported.