Adding & removing Column in Datagrid

Question

Can someone please help me in solving the following problem regarding datagrid... If i right click on the column header of a datagrid a pop up menu should come with add and remove option. On clicking add a new column should be added to the grid and with remove option the corresponding column should be removed. On addition or removal of a column the data already present in the grid should not be affected. Plz help me out.. Regards Deepjyoti,