asp.net - A circular reference was detected while serializing an object of type 'System.Web.HttpContext' -

i want return json object asp.net web service in format {"part_id":"2","part_name":"\u0645\u0633\u062a\u0644\u0632\u0645\u0627 "}

but following error

system.invalidoperationexception: circular reference detected while serializing object of type 'system.web.httpcontext'.

code :

      public class service : system.web.services.webservice       {         public string name;           public service()         {          //uncomment following line if using designed components          //initializecomponent();          }          [webmethod(description = "your description")]         public string functionname()         {           var = new service { name = "tamzinho" };           javascriptserializer js = new javascriptserializer();           string retjson = js.serialize(a);           return retjson;         }       } 

var = new service { name = "tamzinho" }; ... string retjson = js.serialize(a); 

this code problem: serialization attempted infinitely because try serialize instance of same class, attempt serialize instance (and on...)

separate data separate object.

eg:

public class myservicedata {    public string name { get; set; }    public string description { get; set; } }  public class service : system.web.services.webservice {    public myservicedata getinfo(int partid) {        ... data access code        var result = new myservicedata() {             name = ...;            description = ...;        };        ... serialize result data javascript       return result;    } }