c# - MVC LinQ IQueryable Anonymous type handling -

at first, have variable in controller store linq query result shown below:

var test= m in db.testtable           join n in db.testtable2           on m.id equals n.id taba           in taba           join o in db.testtable3           on m.userid equals o.id           select new { .................}; if (test.count() > 0) {     foreach (var k in test)     {         viewdata["dropdown_xxx"] = test.select(j => new { value = j.id, text = j.description})                                    .asenumerable()                                    .select(j => new selectlistitem // work in-memory objects using linq objects instead of linq entities                             {                                 value = j.value.tostring(),                                 text = j.text                             }).tolist();                     }   

the above works , able generate dropdownlist , viewdata.
i'm trying move linq query class instead of putting in controller shown below:

public class testclass{     public iqueryable<dynamic> testmethod(){         return m in db.testtable         join n in db.testtable2         on m.id equals n.id taba         in taba         join o in db.testtable3         on m.userid equals o.id         select new { .................};     } }      

and calling in previous controller:

       var test= new testclass().testmethod(); if (test.count() > 0) {     foreach (var k in test)     {         viewdata["dropdown_xxx"] = test.select(j => new { value = **j.id**, text = **j.description**})                                    .asenumerable()                                    .select(j => new selectlistitem // work in-memory objects using linq objects instead of linq entities                             {                                 value = j.value.tostring(),                                 text = j.text                             }).tolist();                     }   

may know what's wrong code? @ j.id , j.description it's complaining an expression tree may not contain dynamic operation

here dynamic type inside scope of testmethod. better create new class , return class caller.

public class testclass{     public iqueryable<myclass> testmethod(){         return m in db.testtable         join n in db.testtable2         on m.id equals n.id taba         in taba         join o in db.testtable3         on m.userid equals o.id         select new myclass{ .................};     } }     

if need return anonymous type check

can't return anonymous type method? really?