title: Why won't it let me add songs in name space when ive added a ref
body: <p><a href="https://i.stack.imgur.com/v58pa.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/v58pa.png" alt="enter image description here"></a>I can't add the namespace song to do some unit testing when I have added it to the refs I have closed and opened visual studio multiple times now and that isn't working.</p>
  
  <pre><code>using System;
  using Microsoft.VisualStudio.TestTools.UnitTesting;
  using songs;
  
  namespace UnitTestProject3
  {
      [TestClass]
      public class UnitTest1
      {
          [TestMethod]
          public void TestMethod1()
          {
  
          }
      }
  }
  </code></pre>