DragDrop registration did not succeed

Question

System.InvalidOperationException: DragDrop registration did not succeed. ---> System.Threading.ThreadStateException:

What does this except

Answer 1

I have encountered this situation recently,[STAThreadAttribute]is in my case,and i solved this problem by using Invoke method,it might be helpful for you guys,so I share with a little code snippet:

this.Invoke(new InvokeHandler(delegate() 
{
//Your method here!
}));

And InvokeHandler is a delegate like this:

private delegate void InvokeHandler();