The WPF-NHibernate Toolkit

using System;
using System.Text;
using System.Windows;
using System.Windows.Input;
using VmWrapperDemo.Domain;

namespace VmWrapperDemo.ViewModel
{
    public class AddCustomerCommand : ICommand
    {
        #region Fields

        // Member variables
        private readonly MainWindowViewModel m_ViewModel;

        #endregion

        #region Constructor

        public AddCustomerCommand(MainWindowViewModel viewModel)
        {
            m_ViewModel = viewModel;
        }

        #endregion

        #region ICommand Members

        /// <summary>
        /// Whether this command can be executed.
        /// </summary>
        public bool CanExecute(object parameter)
        {
            return true;
        }

        /// <summary>
        /// Fires when the CanExecute status of this command changes.
        /// </summary>
        public event EventHandler CanExecuteChanged
        {
            add { CommandManager.RequerySuggested += value; }
            remove { CommandManager.RequerySuggested -= value; }
        }

        /// <summary>
        /// Invokes this command to perform its intended task.
        /// </summary>
        public void Execute(object parameter)
        {
            // Create new customer
            var newCustomer = new Customer("Moe Construction, Inc.", "Bill Moe");
            newCustomer.Orders.Add(new Order(new DateTime(2009, 04, 04), 3000));
            newCustomer.Orders.Add(new Order(new DateTime(2009, 04, 18), 2450));

            // Add customer to the collection
            var newWrapperObject = new CustomerVM(newCustomer);
            m_ViewModel.Customers.Add(newWrapperObject);

            // Show results in message box
            var n = m_ViewModel.Customers.Count - 1;
            var sb = new StringBuilder();
            sb.Append(String.Format("New customer count: {0}\r\n", m_ViewModel.Customers.Count));
            sb.Append(String.Format("New view model customer name: {0}\r\n", m_ViewModel.Customers[n].Name));
            sb.Append(String.Format("New domain model customer name: {0}\r\n", m_ViewModel.DomainCustomers[n].Name));
            var message = sb.ToString();
            var caption = "Add Customer";
            var buttons = MessageBoxButton.OK;
            var image = MessageBoxImage.Information;
            MessageBox.Show(message, caption, buttons, image);
        }

        #endregion
    }
}