c# - Jquery webservice foreach loop -

i'm trying jquery dropdownlist result set of webservice, getyears function returning list of years 2013,2012,2011.... in list<string> when bind ddlyears values coming 1,2,3,4,5,6

 $.ajax({         type: "post",         url: "../webservice.asmx/getyears",         data:"{}",         contenttype: "application/json; charset=utf-8",         datatype: "json",         async: true,         success: function (msg) {          (var myvar in msg.d) {             $('#ddlyears').append("<option value='" + myvar.tostring() + "'>" + myvar.tostring() + "</option>");         }     },     error: function (jqerr) {         errorcaller(jqerr);     } }); 

try this:

success: function (msg) {      $.each(msg.d, function (k, value) {         $('#ddlyears').append("<option value='" + value + "'>" + value + "</option>");     }); }