public void AddRange_C2()
{
var ds = new DataSet();
ds.Tables.Add(DataProvider.CreateParentDataTable());
ds.Tables.Add(DataProvider.CreateChildDataTable());
ds.Tables[1].Constraints.AddRange(GetConstraintArray(ds)); //Cuz foreign key belongs to child table
Assert.Equal(2, ds.Tables[1].Constraints.Count);
Assert.Equal(1, ds.Tables[0].Constraints.Count);
}