Can I send webrequest from specified ip address with .NET Framework?

Question

I have a server with multi ip addresses. Now I need to communicate with several servers with http protocol. Each server only accept the request from a specified ip address o

Answer 1

If you want to do this using WebClient you'll need to subclass it:

var webClient = new WebClient2(IPAddress.Parse("10.0.0.2"));

and the subclass:

public class WebClient2 : WebClient
{
    public WebClient2(IPAddress ipAddress) {
        _ipAddress = ipAddress;
    }

    protected override WebRequest GetWebRequest(Uri address)
    {
        WebRequest request = (WebRequest)base.GetWebRequest(address);

        ((HttpWebRequest)request).ServicePoint.BindIPEndPointDelegate += (servicePoint, remoteEndPoint, retryCount) => {

            return new IPEndPoint(_ipAddress, 0);
        };

        return request;
    }
}

(thanks @Samuel for the all important ServicePoint.BindIPEndPointDelegate part)