How to handle error "Invoke or BeginInvoke cannot be called on a control until the window handle has been created"

This error often occurs when you handle a UI Control that has not been created (ie not yet on the window) but you call Invoke of BeginInvoke before

How to fix:

Way 1: Check handle has been created or not 

if(uiControl.IsHandleCreated)

{

    uiControl.Invoke((MethodInvoker)delegate

    {

        // Your code here.

    });

}

else

{

    // Handle has not yet been created.

    // You may want to handle this situation differently.

}

Way 2: Use SynchronizationContext . This is a mechanism that helps you queue code for Thread UI to process

// Get the UI synchronization context.

SynchronizationContext uiContext = SynchronizationContext.Current;

// Post a delegate to the UI thread.

uiContext.Post(new SendOrPostCallback((state) =>

{

    // Your code here.

}), null);