C# Error [ Set (Check \ Uncheck) CheckBox in GridView ] มีรูปตัวอย่างด้านใน รบกวนหน่อยครับ

            DataGridViewCheckBoxColumn checkBoxColumn = new DataGridViewCheckBoxColumn();
            checkBoxColumn.HeaderText = "";
            checkBoxColumn.Width = 30;
            checkBoxColumn.Name = "checkBoxColumn";
            dgvUser.Columns.Insert(0, checkBoxColumn);

            SqlDataAdapter da2 = new SqlDataAdapter("select ID,Name,Lastname,Department,Status from tbl_Register", DB.conn);
            DataTable dt = new DataTable();
            da2.Fill(dt);
            dgvUser.DataSource = dt;

            foreach (DataGridViewRow row in dgvUser.Rows)
            {
                bool Status = (row.Cells("checkBoxColumn") as CheckBox).Checked;

            }