How To Create a Servlet (ashx) in .NET using Visual Studio C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Xml.Linq;

namespace SalesforceWS
{
   /// <summary>
   /// Summary description for $codebehindclassname$
   /// </summary>
   [WebService(Namespace = "http://tempuri.org/")]
   [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
   public class Handler1 : IHttpHandler
   {
       public void ProcessRequest(HttpContext context)
       {
          
           context.Response.ContentType = "text/plain";


           //Code snippet to get parameter value
            string param = context.Request.Params["paramname"];
          
          //example on one way of using the parameter value
           switch (param)
           {
               case "somevalue":
	     /*You can write back simple text just like in Java or PHP or Ruby or some other server side application that supports HTTPRequests and HTTResponses*/

                   context.Response.Write("write back some text");
                   
                   break;
               case "othervalue":
	     /*
	      * You can also write back the result from a method or another class.
	      * 
    */
                   context.Response.Write(GetSomeDataMethodLikeJava());
                   break;
           
           }
       }

       public bool IsReusable
       {
           get
           {
               return false;
         
           
           }
       }

       public string GetSomeDataMethodLikeJava()
       {
           String somevalue;

		//Add code

           return somevalue;

       }
   }
}