System.Data.Tests.DataProvider.TryToBreakUniqueConstraint C# (CSharp) Метод

        public static void TryToBreakUniqueConstraint()
        {
            //Create the constraint
            DataTable dt = CreateUniqueConstraint();
            //Try to violate the constraint

            DataRow dr1 = dt.NewRow();
            dr1[0] = 1;
            dt.Rows.Add(dr1);
        }

 public void Add_SDB4()
 {
     Assert.Throws <ConstraintException>(() =>
     {
         DataTable dt = DataProvider.CreateParentDataTable();
         dt.Constraints.Add("UniqueConstraint", dt.Columns["ParentId"], false);
         DataProvider.TryToBreakUniqueConstraint();
         Assert.Equal(2, dt.Select("ParentId=1").Length);
     });
 }