Cast of DBNull

Hi , I got a problem in formatting of date when i try to do the following, if(c.Value.GetType() != typeof(DBNull)) { DateTime dt = DateTime.Parse(c.Value.ToString()); c.Value = dt.ToString("dd/MM/yyyy"); } It says "Object cannot be cast from DBNull to other types" what i have to do ... pls help me soon as possible guys. thank u