public void RemoveclassRow(classRow row) {
     this.Rows.Remove(row);
 }
 public classRowChangeEvent(classRow row, global::System.Data.DataRowAction action) {
     this.eventRow = row;
     this.eventAction = action;
 }
 public void AddclassRow(classRow row) {
     this.Rows.Add(row);
 }