Hi,
I am planning to extend DataGridView control to hosting my own Editing
control.  Here is my class which derived from DataGridViewColumn.

public class MyDataGridViewMaskedTextBoxColumn : DataGridViewColumn
{
  .....
   [
       Category("EditingControl Settings"),
       Browsable(true),
   ]
   public string Mask
   {
       get { return m_csMaskString;
   }
   set
   {
       m_csMaskString = value;
   }
}

I am fining out that in design time, whatever I assign to "Mask" property,
it is not persistent into .cs file. Do you have any ideas?
Thank you very much.