c# - IEnumerable<> to IList<> -

i using linq query database , returning generic ilist.

whatever tried couldn't convert iqueryable ilist.

here code.

i cannot write simpler , don't understand why not working.

public  ilist<iregion> getregionlist(string countrycode) {     var query = c in database.regiondatasource                 (c.countrycode == countrycode)                 orderby c.name                select new {c.regioncode, c.regionname};        return query.cast<iregion>().tolist();  } 

this returns list right number of items empty please help, bloqued couple of days now

your select statement returns anonymous type: new {c.regioncode, c.regionname}

this can't converted iregion - duck-typing, c# doesn't support.

your linq statement should return type implements iregion - code should work.

however shouldn't run - cast<iregion> should throw runtime exception.

basically:

// isn't anonymous, , should cast public class myregion : iregion {     public string regioncode {get;set;}     public string regionname {get;set;} }  public  ilist<iregion> getregionlist(string countrycode) {     var query = c in database.regiondatasource                 (c.countrycode == countrycode)                 orderby c.name                select new myregion {regioncode = c.regioncode, regionname = c.regionname};        return query.cast<iregion>().tolist();  } 

---

update

if underlying linq type implements iregion can lot simpler:

public  ilist<iregion> getregionlist(string countrycode) {     var query =          region in database.regiondatasource         region.countrycode == countrycode         orderby region.name         select region;        return query.tolist();  }