Building WPF Applications with Self-Tracking Entity Generator - Project Setup

using System;
using GalaSoft.MvvmLight.Messaging;

namespace SchoolSample.Common
{
    public class AppMessages
    {
        enum MessageTypes
        {
            RaiseError,
            PleaseConfirm,
            StatusUpdate,
            BeginEdit,
            CancelEdit,
            EndEdit
        }

        public static class RaiseErrorMessage
        {
            public static void Send(Exception ex)
            {
                Messenger.Default.Send(ex, MessageTypes.RaiseError);
            }

            public static void Register(object recipient, Action<Exception> action)
            {
                Messenger.Default.Register(recipient, MessageTypes.RaiseError, action);
            }
        }

        public static class PleaseConfirmMessage
        {
            public static void Send(DialogMessage dialogMessage)
            {
                Messenger.Default.Send(dialogMessage, MessageTypes.PleaseConfirm);
            }

            public static void Register(object recipient, Action<DialogMessage> action)
            {
                Messenger.Default.Register(recipient, MessageTypes.PleaseConfirm, action);
            }
        }

        public static class StatusUpdateMessage
        {
            public static void Send(DialogMessage dialogMessage)
            {
                Messenger.Default.Send(dialogMessage, MessageTypes.StatusUpdate);
            }

            public static void Register(object recipient, Action<DialogMessage> action)
            {
                Messenger.Default.Register(recipient, MessageTypes.StatusUpdate, action);
            }
        }

        public static class BeginEditMessage
        {
            public static void Send(string screenName)
            {
                Messenger.Default.Send(screenName, MessageTypes.BeginEdit);
            }

            public static void Register(object recipient, Action<string> action)
            {
                Messenger.Default.Register(recipient, MessageTypes.BeginEdit, action);
            }
        }

        public static class CancelEditMessage
        {
            public static void Send(string screenName)
            {
                Messenger.Default.Send(screenName, MessageTypes.CancelEdit);
            }

            public static void Register(object recipient, Action<string> action)
            {
                Messenger.Default.Register(recipient, MessageTypes.CancelEdit, action);
            }
        }

        public static class EndEditMessage
        {
            public static void Send(string screenName)
            {
                Messenger.Default.Send(screenName, MessageTypes.EndEdit);
            }

            public static void Register(object recipient, Action<string> action)
            {
                Messenger.Default.Register(recipient, MessageTypes.EndEdit, action);
            }
        }
    }
}