Visual Studio 2013 C# Editor doesn't recognize my class

Hi I have 2 classes in a MVC 5 project with Visual Studio 2013 Update 4 like the following:

Class #1

using System.Collections.Generic;

namespace Model
{
    public class OrderLine
    {
          public Product Product {get;set;}
          ....
          ....
    }

}

My second file in the same project inside the same folder (Model):

namespace Model
{
     public class Product 
     {
         ....
         ....
         //some product class properties
     }
}

My problem is that in my first class (OrderLine) the Product class appears in red and even that the project compiles perfectly I can't access the Product properties such as this.Product.Name the C# editor cannot find the properties.

As I mentioned the project compiles without problem it is just that the C# editor makes it hard to code because it doesn't recognize the class or properties.

I have try already repair visual studio and repair also the Update 4 without any luck.

Any ideas??

Thanks a lot in advance.

Hi turns out that I have found the solution for this; it was a Resharper issue which got fixed by following the solution from this post:

Link: ReSharper "can not resolve symbol" even when project builds

Solution:
VS -> Tools -> Options -> ReSharper Suspend button 
Clear Contents of -> AppData\Local\JetBrains\ReSharper\v7.1\SolutionCaches
VS -> Tools -> Options -> ReSharper Resume  button

IMPORTANT the folder of version of ReSharper might change according to your latest version.