Visual studio 2012 Fakes

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MiddleLayer
{
    public interface IEmailLibrary
    {
        bool SendEmail();
    }

    public class EmailLibrary : IEmailLibrary
    {
        public bool SendEmail()
        {
            throw new Exception("Email server is not configured");
            return true;
        }
    }
}