System.Data.Tests.DataRelationCollectionTest.Clear C# (CSharp) Метод

        public void Clear()
        {
            DataRelationCollection drcol = _dataset.Relations;
            DataColumn parentCol = _dataset.Tables["Customer"].Columns["custid"];
            DataColumn childCol = _dataset.Tables["Order"].Columns["custid"];
            drcol.Add(new DataRelation("CustOrder", parentCol, childCol));
            drcol.Add("ItemOrder", _dataset.Tables["Item"].Columns["itemid"]
                                 , _dataset.Tables["Order"].Columns["itemid"]);
            drcol.Clear();
            Assert.Equal(0, drcol.Count);
        }