entity framework - Get Object reference not set to an instance of an object. Error from Linq -

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• what nullreferenceexception, , how fix it? 33 answers

i object reference not set instance of object. error

here code:

    public actionresult profile(string id)     {              news_application.newsdatabaseentities db = new news_application.newsdatabaseentities();             var result = (from u in db.aspnetusers                           u.id == id                           select new { u.id, u.writername, u.profilepicture }).firstordefault();              userviewmodel mo = new userviewmodel();                mo.id = result.id;               mo.writername = result.writername;               mo.writerimage = result.profilepicture;                 return view(mo);     } 

please me. thank much

i think linq query giving null condition have. trying access property values of result without checking whether null or not

public actionresult profile(string id) {     var db = new news_application.newsdatabaseentities();     var result = (from u in db.aspnetusers                           u.id == id                      select new { u.id, u.writername, u.profilepicture }).firstordefault();      if(result==null)     {       return content("no records matching condition");      //to : change not found view.     }     userviewmodel mo = new userviewmodel();       mo.id = result.id;      mo.writername = result.writername;      mo.writerimage = result.profilepicture;       return view(mo); } 

also may project result userviewmodel , make more simple/short

var users=db.aspnetusers.where(s=>sid==id)                  .select(x=> new userviewmodel { id=x.id,                                                  writerimage =x.profileimage,                                                   writername=x.writename}).tolist();  if(users.any())  {    return view(users.first());  }  return content("user not found");