title: Fatal error- Monodevelop-Unity failed to start
body: <p>I originally installed unity but the monodevelop seems to not been installed as i tried to open a script in unity but nothing come out, saying i should find a software that opens it up when i have already set the preferences to monodevelop(built-in).</p>
  
  <p>Then i reinstalled it again, this time, it contains visual studio too. then it can only open with visual studio. When I tried to open with monodevelop, the following pop-up will apear.</p>
  
  <p><a href="https://i.stack.imgur.com/O91RF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/O91RF.png" alt="pop-up error"></a></p>
  
  <p>But I have already installed the two things which is /net and gtk. as shown below. what is the problem?</p>
  
  <p><a href="https://i.stack.imgur.com/32cro.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/32cro.png" alt="software instaled"></a></p>