将InvokeRequired转换为VB WPF中的Dispatch

Hello I'm stuck on the last section of my code in which I'm converting from standard VB to VB WPF I was originally using invoke commands but I'm struggling to use them within VB WPF. Currently I'm on the final two lines but I just can't seem to figure out how to rewrite it, could you possibly help?Hello I'm stuck on the last section of my code