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

        public void CanRemove()
        {
            DataRelationCollection drcol = _dataset.Relations;
            DataColumn parentCol = _dataset.Tables["Customer"].Columns["custid"];
            DataColumn childCol = _dataset.Tables["Order"].Columns["custid"];
            DataRelation dr = new DataRelation("CustOrder", parentCol, childCol);

            drcol.Add(dr);
            Assert.True(drcol.CanRemove(dr));
            Assert.False(drcol.CanRemove(null));
            DataRelation dr2 = new DataRelation("ItemOrder"
                        , _dataset.Tables["Item"].Columns["itemid"]
                        , _dataset.Tables["Order"].Columns["custid"]);
            Assert.False(drcol.CanRemove(dr2));
        }