run chromium browser from specific ethernet

Question

12hours of searching :( Im trying to run chromium(cef) browser from specific ethernet but no luck to find specific answer hope someone help me, thanks in advance

i tried these code

ChromiumWebBrowser chrome;

var frame = chrome.GetMainFrame();
var request = frame.CreateRequest(initializePostData:true);

HttpWebRequest httpRequest = (HttpWebRequest)request;
httpRequest.ServicePoint.BindIPEndPointDelegate =
    new BindIPEndPoint(BindIPEndPointCallback);

...

private static IPEndPoint BindIPEndPointCallback(ServicePoint servicePoint,
                                                    IPEndPoint remoteEndPoint,
                                                    int retryCount)
{
    if (remoteEndPoint.AddressFamily == AddressFamily.InterNetwork)
    {
        return new IPEndPoint(IPAddress.Parse("192.168.16.100"), 0);
    }
    // Just use the default endpoint.
    return null;
}

but it doesnt work and error

just combine codes from these links

https://github.com/cefsharp/CefSharp/blob/cd934267c65f494ceb9ee75995cd2a1ca0954543/CefSharp.Wpf.Example/ViewModels/BrowserTabViewModel.cs#L213

...

Choose one of many Internet connections for an application

...

i found similar question but did not get right answer from this CefSharp choose local end point