asp.net - How to convert Json in C#? -

i using c#.net asp.net mvc. have following code

var lstrelations = _people.getallusers(); list<string> lstemailaddresses = lstrelations.select(p =>p.emailid).tolist<string>();  return json(lstemailaddresses, jsonrequestbehavior.allowget); 

this generating output like

["xxy@xct.com", "text13@tds.com", "sdxxa@xys.com"] 

but want generate json

["emailid:xxy@xct.com", "emailid:text13@tds.com", "emailid:sdxxa@xys.com"] 

i want put name of each address "emailid"

try code...

var lstrelations = _people.getallusers(); var lstemailaddresses = lstrelations.select(p => new { emailid = p.emailid }).tolist(); json(lstemailaddresses, jsonrequestbehavior.allowget);