Quickly execute code in the background:

new Thread((ThreadStart)delegate()
    {
        // code here is executed on a new thread
        // blocking operations will not block the calling thread
    }).Start();

Note that if this code is to be called often, a ThreadPool may be the better choice. ThreadPools’ have less overhead for instances when many threads would be created and destroyed.

Execute code that manipulates UI:

if (Control.IsHandleCreated)
{
   Control.Invoke((MethodInvoker)delegate()
   {
        // code here is safe to interact with Control
   });
}

Replace ‘Control’ with ‘this’ inside the Form class. Control may refer to any control created on the UI thread.