Simplest way to update UI from another thread in WinForms

WinForms_Invoke.cs

myControl.Invoke((Action)delegate
{
    myControl.Enabled = true;
});

// More correct way
public static class ControlEx
{
    public static void Invoke(this Control control, MethodInvoker action)
    {
        if (!control.IsHandleCreated)
        {
            return;
        }
        if (control.InvokeRequired)
        {
            control.Invoke(action);
        }
        else
        {
            action();
        }
    }
}