Using the Microsoft.LightSwitch.ExportProvider.dll to utilize the MEF in LightSwitch

PremiumComponentFactory

using System;
using LightSwitchApplication.UserCode.Constants;
using Microsoft.VisualStudio.ExtensibilityHosting;
using System.Linq;

namespace LightSwitchApplication.UserCode.Premium
{
    /// <summary>
    /// To centralize the method selection use this factory
    /// So in the future it will not be cluttered
    /// </summary>
    public class PremiumComponentFactory
    {

        public IPremiumComponent GetInstance(PremiumComponentType premiumComponentType)
        {
           
             var result = VsExportProviderService.GetExportedValues<IPremiumComponent>()
                                                .FirstOrDefault(m => m.PremiumComponentType == premiumComponentType);


            if (result == null)
                throw new NotImplementedException(string.Format("The selected milk component type '{0}' does not exists from our list.", premiumComponentType.ToString()));
             
            return result;

        }


        

 
    }
}