System.Data.DataRelationCollection.RemoveCore C# (CSharp) Method

        protected virtual void RemoveCore(DataRelation relation)
        {
            DataCommonEventSource.Log.Trace("<ds.DataRelationCollection.RemoveCore|INFO> {0}, relation={1}", ObjectID, (relation != null) ? relation.ObjectID : 0);
            if (relation == null)
            {
                throw ExceptionBuilder.ArgumentNull(nameof(relation));
            }

            DataSet dataSet = GetDataSet();
            if (relation.DataSet != dataSet)
            {
                throw ExceptionBuilder.RelationNotInTheDataSet(relation.RelationName);
            }

            if (relation.Nested)
            {
                relation.ParentTable.ElementColumnCount--;
                relation.ParentTable.Columns.UnregisterName(relation.ChildTable.TableName);
            }
        }