Microsoft.XMLHTTP in C#.NET

I currently have a project converting asp classic codes to C#, then i came into this section of the code...

    Function sendRequest(sRequest) //sRequest is XML data
    Dim sResponse

    Set oHTTP = Server.CreateObject("Microsoft.XMLHTTP")

    oHTTP.open                  HTTP_POST, WDL_URL_PREFIX, false
    oHTTP.setRequestHeader      "Content-Type", "application/x-w开发者_如何学编程ww-form-urlencoded"
    oHTTP.send                  "IN=" & Server.UrlEncode(sRequest)

    sResponse = oHTTP.responseText
    sendRequest = sResponse
    End Function

The function basically sends XML data via HTTP and it uses Microsoft.XMLHTTP object. Now, what is the equivalent of this object(Microsoft.XMLHTTP) in .NET because I don't want to use this legacy classic DLL...

Thanks...

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In .NET, the easiest implementation there is simply:

string url = ..., request = ...;
using (var client = new WebClient())
{
    var response = client.UploadValues(url, new NameValueCollection {
        {"IN",request}
    });
    var text = client.Encoding.GetString(response);
}

I'm using C# here, but it applies to VB too.

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Try looking into System.Net.WebRequest: http://msdn.microsoft.com/en-us/library/system.net.webrequest.aspx