Correct the codes

How to ensure these codes

    If (Request.ServerVariables("REQUEST_METHOD") == "POST")
    string xmlhttp;
    string DataToSend;
    string postUrl;
    If (Request.Form.Item("Operation")=="Sum")
    postUrl = "http://localhost/Test_ASP_Service1/Service1.asmx/Sum";
    postUrl = "http://localhost/Test_ASP_Service1/Service1.asmx/Subtract" ;

    Set xmlhttp = server.Createobject("MSXML2.XMLHTTP");
    xmlhttp.Open "POST",postUrl,false;
    xmlhttp.setRequestHeader "Content-Type","application/x-www-form-urlencoded";
    xmlhttp.send DataToSend;
    Response.Write DataToSend & "<br>";
    Response.Write "Loading for first Time";

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are working fine in C# syntax, as I'm to call Web service within ASP.NET project?
LVL 12
HuaMin ChenProblem resolverAsked:
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Daniel Van Der WerkenIndependent ConsultantCommented:
Are you trying to convert this method to C# from VB .NET and having difficulty doing the conversion?

The code you show looks like a combination of C# and VB .NET, but I'm not sure what you want.
here you go

if (Request.ServerVariables("REQUEST_METHOD") == "POST")
    string DataToSend="val1=" + Request.Form("text1") + "&val2=" + Request.Form("text2");
    string postUrl = "";
    if (Request.Form.Item("Operation") == "Sum")
    	postUrl = "http://localhost/Test_ASP_Service1/Service1.asmx/Sum";
    	postUrl = "http://localhost/Test_ASP_Service1/Service1.asmx/Subtract" ;

    var xmlhttp = server.Createobject("MSXML2.XMLHTTP");
    xmlhttp.Open("POST", postUrl, false);
    xmlhttp.SetRequestHeader("Content-Type", "application/x-www-form-urlencoded");
    Response.Write(DataToSend + "<br>");
    Response.Write("Loading for first Time");

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