title: interesting error: new form has black line across it, how do I get rid of it
body: <p>I was creating a new form and my IDE crashed, or it was having problems, and now every time I create a new form it has a black line across it.  The black line is not something I was adding, it appears to be the black line from the top of the form getting painted in the wrong place.  The interesting thing is that every time I reload the form the line moves up until after the 5th load it disappears.  How do I stop this happening?  I have tried build, rebuild, clean solution (restart visual studio) but it is still there, it isn't consistent either which also annoying, any ideas?</p>
  
  <p><img src="https://i.stack.imgur.com/VpQE0.png" alt="screenshot of form with black line through it">  </p>