public static void Decrease(DataGridView dataGridView, string ColumnName, int row)
 {
     if ((Convert.ToDouble(GridUtility.GetValue(dataGridView, row, ColumnName)) - 1) > 0)
     {
         GridUtility.UpdateARow(dataGridView, row, ColumnName, Convert.ToDouble(GridUtility.GetValue(dataGridView, row, ColumnName)) - 1);
     }
 }
 public static void Increase(DataGridView dataGridView, string ColumnName, int row, decimal qty)
 {
     GridUtility.UpdateARow(dataGridView, row, ColumnName, Conversion.ToDecimal(GridUtility.GetValue(dataGridView, row, ColumnName)) + qty);
 }