Windows 7 End call not working

[suravi999]

I have build staging branch on windows7. everything working fine.

I have implemented end call function like this

`public void endCall() {

            foreach (var s in Streams)
            {
                if (!s.Value.Cancel.IsCancellationRequested)
                {
                    s.Value.Cancel.Cancel();
                }
            }

            server.Dispose();
            Streams.Clear();
        
    }` 

but I'm getting access violation issue.

Please refer bellow image, How to fix this issue?

[suravi999]

@radioman any idea about this issue

[Rendtime]

I have the same problem