System.Data.DataRelationCollection.DataTableRelationCollection.this C# (CSharp) 메소드

            public override DataRelation this[int index]
            {
                get
                {
                    if (index >= 0 && index < _relations.Count)
                    {
                        return (DataRelation)_relations[index];
                    }
                    throw ExceptionBuilder.RelationOutOfRange(index);
                }
            }