Why does this error not get caught?

I have the following code in my project, deleteselector is a form that has a datagridview (with autosize columns) on it.

try
{
      if (deleteSelector.ShowDialog() == DialogResult.OK)
      {
      }
}
catch (InvalidOperationException)
{
   //Bug workaround
}

The try catch is because a pop-up form with a gridview on it trows a invalidoperationexception once in a while. This is the suggested workaround, see

http://connect.microsoft.com/VisualStudio/feedback/details/145633/invalidoperationexception-thrown-when-a-form-with-a-bound-datagridview-with-auto-sizing-columns-is-shown

Earlier, I used Show on the deleteSelect开发者_开发百科or, and the workaround worked perfectly. Now, with showdialog it seems that the error is not catched anymore (I get an uncatched error message). Why is the error not catched?

---

ShowDialog runs the dialog on a separate thread, so the exception is being thrown in a different stack to your exception handler.

I suggest you try to find a different workaround - just catching InvalidOperationException is pretty horrible, and I wouldn't like to bet that the form would be in a sensible state afterwards.