internal DataRelation FindParentRelation()
{
var parentRelations = new DataRelation[Table.ParentRelations.Count];
Table.ParentRelations.CopyTo(parentRelations, 0);
for (int i = 0; i < parentRelations.Length; i++)
{
DataRelation relation = parentRelations[i];
DataKey key = relation.ChildKey;
if (key.ColumnsReference.Length == 1 && key.ColumnsReference[0] == this)
{
return relation;
}
}
return null;
}