how to undo the datagridview combobox column in c#

Hi below links helpful for you.

 

 https://social.msdn.microsoft.com/Forums/windows/en-US/86a83bf0-ff46-4d21-846c-de794f3fcbd3/c-datagridview-combobox-column-dropdown-list-remove-elements?forum=winformsdatacontrols

https://stackoverflow.com/questions/24702413/how-can-i-retrieve-the-previous-value-of-a-datagridview-cell-using-the-cellvalue

 

 

https://stackoverflow.com/questions/24702413/how-can-i-retrieve-the-previous-value-of-a-datagridview-cell-using-the-cellvalue