private void buttonAdd_Click(object sender, EventArgs e)
 {
     EmployeesProxyStub emp = new EmployeesProxyStub();
     emp.FirstName = "Mr.";
     emp.LastName = "EntitySpaces";
     coll.Collection.Add(emp);
 }
        private void AddButton_Click(object sender, RoutedEventArgs e)
        {
            if (employees == null)
            {
                employees = new EmployeesCollectionProxyStub();
                EmployeesDataGrid.ItemsSource = employees.Collection;
            }

            if (RecordsAdded++ < 5)
            {
                EmployeesProxyStub newEmp = new EmployeesProxyStub();
                newEmp.FirstName = "Scott";
                newEmp.LastName = "Schecter";

                employees.Collection.Add(newEmp);
            }
        }