title: F5 or Start Debugging Button is Greyed Out for Winform application?
body: <p>I know there are many question related to this already on SO but none of them has woked for me till now.</p>
  
  <p>I have a winform application but when I am trying to debug it my Start button is disabled.</p>
  
  <p>Now when I am trying to debug my Start Debugging key is disabled</p>
  
  <p><img src="https://i.stack.imgur.com/CZ8wN.png" alt="enter image description here"></p>
  
  <p>Things which I have already done are:</p>
  
  <p>1) I have already set my winform application as the Single Start Up project.</p>
  
  <p>2) I have removed the multiple start up project option.</p>
  
  <p>3) I have tried to restart my Visual Studio many times.</p>
  
  <p>4) I have rebuild the application and it is building successfully with no errors.</p>
  
  <p>5) I have build the entire solution and it also build successfuly with no errors.</p>
  
  <p>6) I have checked the sln file and the Format version in it is:</p>
  
  <blockquote>
    <p>Microsoft Visual Studio Solution File, Format Version 11.00</p>
  </blockquote>
  
  <p>which I suppose is correct.</p>