public void AddAndDeleteNewOuSubmitChangesTest()
        {
            using (var context = new DirectoryContextMock(ConnectionString, Username, Password))
            {
                var ou = new OU {
                    Name = "ChildOU"
                };
                ou.SetParent(context.OrganizationUnits.First(u => u.Name == "TestOU"));
                context.AddObject(ou);
                context.SubmitChanges();

                var childOu = context.OrganizationUnits.First(u => u.Name == "ChildOU");
                context.DeleteObject(childOu);
                context.SubmitChanges();
            }
        }