// Threading in C# - Invoking Methods (if required)
public static void InvokeIfRequired(this Control c, Action a) {
    if (c.InvokeRequired) {
        c.Invoke(new MethodInvoker(() => { InvokeIfRequired(c, a); }));
        return;
    }
    try {
        if (!c.IsHandleCreated) { IntPtr i = c.Handle; }    // See links above - handle is not created, will cause cross-thread exceptions
        a.Invoke();
    } catch (Exception ex) { }
}