System.Data.DataTable.AddForeignKey C# (CSharp) Method

        internal DataColumn AddForeignKey(DataColumn parentKey)
        {
            Debug.Assert(parentKey != null, "AddForeignKey: Invalid paramter.. related primary key is null");

            string keyName = XMLSchema.GenUniqueColumnName(parentKey.ColumnName, this);
            DataColumn foreignKey = new DataColumn(keyName, parentKey.DataType, null, MappingType.Hidden);
            Columns.Add(foreignKey);

            return foreignKey;
        }