title: Visual Studio 2013 and C# - Unable to add event handler
body: <p>I am working on WPF project, and after I made everything in Xaml file I wanted to start doing on my CS file.
  Now, I was trying to add event using that little bolt in properties, but everytime i click on any event (for example I select button in XAML and try to add -> MyButton_Click) i get a pop-up message "UNABLE TO ADD EVENT HANDLER".</p>
  
  <p>I hope you are able to help me.</p>