System.Data.Common.DataTableMappingCollection.Add C# (CSharp) Method

        private DataTableMapping Add(DataTableMapping value)
        {
            AddWithoutEvents(value);
            return value;
        }

        public void SourceTableParentValidation()
        {
            // Sets dataTableMappingCollection as the dataTableMapping Parent.
            DataTableMappingCollection dataTableMappingCollection = new DataTableMappingCollection();

            dataTableMappingCollection.Add(_dataTableMapping);

            // Adds a data table with another source table name.
            DataTableMapping secondDataTableMapping = new DataTableMapping("AnotherCustomSourceTable", "");

            dataTableMappingCollection.Add(secondDataTableMapping);

            // Attempts to change the second data table source table with a repeated value.
            Assert.Throws <ArgumentException>(() => secondDataTableMapping.SourceTable = "MyCustomSourceTable");
        }