How to force ipv6 or ipv4 for HttpWebRequest or WebRequest C#

Question

Coming from node.js I can do this to tell node.js to make the request using ipv6 vs ipv4

var http = require(\"http\");
var options = {
  hostname: \"google.c         


        

Answer 1

You can use ServicePoint.BindIPEndPointDelegate.

var req = HttpWebRequest.Create(url) as HttpWebRequest;

req.ServicePoint.BindIPEndPointDelegate = (servicePoint, remoteEndPoint, retryCount) =>
{
    if (remoteEndPoint.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6)
    {
        return new IPEndPoint(IPAddress.IPv6Any, 0);
    }

    throw new InvalidOperationException("no IPv6 address");
};