title: Cannot add reference to program
body: <p>I added a program to my solution and this happens from time to time but not as bad as this time.</p>
  
  <p>It show a yellow triangle as if I do not have a reference; however, I have added a reference about 20 times and it does not add anything to the bin but it does add that triangle reference to the references shown in the snapshot.</p>
  
  <p>This little issue doesn't happen often so when it does i always forget how i fixed it the previous time, but as of now it has my entire solution broken.</p>
  
  <p>Which file it is that points these references the correct way so this error does not happen?</p>
  
  <p>Like mentioned, I add it, look in the bin, not there, look at the references, it's there with a triangle. </p>
  
  <p>FYI, it will do this to any reference i try to add.</p>
  
  <p>I've deleted the program, added it back, it is just a pain.</p>
  
  <p>Please see ElevationMaker</p>
  
  <p><strong>ElevationMaker is the program i added that you cannot see that i am attempting to add a reference to.</strong></p>
  
  <p>Thank you very much.</p>
  
  <p><a href="https://i.stack.imgur.com/VAi3d.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VAi3d.jpg" alt="Cannot Add References"></a></p>