public void AddInRelation(IDesignRelation ir) { if (!InRelationList.Contains(ir)) { InRelationList.Add(ir); } }
public void RemoveRelation(IDesignRelation dr) { if (OutRelationList.Contains(dr)) { OutRelationList.Remove(dr); } if (InRelationList.Contains(dr)) { InRelationList.Remove(dr); } }