System.Data.Tests.ConstraintCollectionTest2.Remove_CheckUnique C# (CSharp) Метод

        public void Remove_CheckUnique()
        {
            DataTable table = new DataTable();
            DataColumn col1 = table.Columns.Add("col1");
            DataColumn col2 = table.Columns.Add("col2");

            Assert.False(col1.Unique);

            Constraint uc = table.Constraints.Add("", col1, false);
            Assert.True(col1.Unique);

            table.Constraints.Remove(uc);
            Assert.False(col1.Unique);

            table.PrimaryKey = new DataColumn[] { col2 };
            Assert.Throws<ArgumentException>(() => table.Constraints.Remove(table.Constraints[0]));
        }