public void GetClipboardContentTestException()
        {
            DataGridViewColumnHeaderClipboardCell cell = new DataGridViewColumnHeaderClipboardCell();

            using (DataGridView dgv = new DataGridView()) {
                DataGridViewColumn col = new DataGridViewColumn();
                col.CellTemplate = new DataGridViewTextBoxCell();
                col.HeaderCell   = cell;
                dgv.Columns.Add(col);
                DataGridViewRow row = new DataGridViewRow();
                dgv.Rows.Add(row);
                dgv.Rows [0].SetValues("abc");
                dgv.Rows [0].Cells [0].Selected = true;

                cell = dgv.Columns [0].HeaderCell as DataGridViewColumnHeaderClipboardCell;
                cell.GetClipboardContentPublic(0, false, false, false, false, "Text");
            }
        }
		public void GetClipboardContentTestException ()
		{
			DataGridViewColumnHeaderClipboardCell cell = new DataGridViewColumnHeaderClipboardCell ();
			
			using (DataGridView dgv = new DataGridView ()) {
				DataGridViewColumn col = new DataGridViewColumn ();
				col.CellTemplate = new DataGridViewTextBoxCell ();
				col.HeaderCell = cell;
				dgv.Columns.Add (col);
				DataGridViewRow row = new DataGridViewRow ();
				dgv.Rows.Add (row);
				dgv.Rows [0].SetValues ("abc");
				dgv.Rows [0].Cells [0].Selected = true;

				cell = dgv.Columns [0].HeaderCell as DataGridViewColumnHeaderClipboardCell;
				cell.GetClipboardContentPublic (0, false, false, false, false, "Text");

			}
		}