private void GetData()
        {
            var dt = new DataTable();

            dt.Columns.Add("Schedule Item", typeof (string));
            dt.Columns.Add("Job Section", typeof (string));
            dt.Columns.Add("Long Description", typeof (string));

         dt.Columns.Add("Short  Description", typeof (string));
             dt.Columns.Add("Base Rate", typeof (double));
            dt.Columns.Add("Unit", typeof (string));
            dt.Columns.Add("Quantity", typeof (int));
            dt.Columns.Add("Total Price", typeof (double), "[Base Rate] * [Quantity]");


            var items = new[]
                            {
                                "Whole Premises", "Hallway/Entrance", "Lounge", "Kitchen", "Bathroom", "Bedroom1",
                                "Bedroom2", "Bedroom3", "Additions", "Omissions" };

                     

                             
                          


            xamDataGrid.DataSource = dt.DefaultView;

            foreach (var record in xamDataGrid.Records)
            {
                record.IsExpanded = true;
            }
        }

I want to add a button and when i click on it  .. it will hide the long description Column and runtime ..

How can i do this ?

Thanks in advance