c# - Getting error in LINQ Expression or converting service to client simple mapping -

getting error

"system.linq.enumerable+whereselectenumerableiterator`2[person.models.iprofession,system.string]" 

code below: trying have collection of result. service returns me collection think , need iterate through , store list have collection. please me

public class professionresult {     public string name { get; set; }     public string id{ get; set; } }  public list<professionresult> professionresults {         {         var professionresults = new list<professionresult>();          professionresults.add(new professionresult()         {             name = people?.where(p => p.isselected)                 .select(c => c.professionresults.select(n => n.name))                 .tostring() ?? null,             id = people?.where(p => p.isselected)                 .select(c => c.professionresults.select(i => i.id))                 .tostring() ?? null         });          return professionresults;     } } 

a basic google search on partial error message revealed post: linq query on xdocument returns "system.linq.enumerable+whereselectenumerableiterator'2[system.xml.linq.xelement,system.string]

according it,

yes, that's because you've calling tostring() directly on query second , third values.

basically, don't call tostring() on queries. if want single value, use single(), first() etc. if want multiple values, iterate on them , want each of them in turn - or join them in appropriate fashion.

which means have store values initial format , not use tostring() on them inside linq query.

*edit**

for example, try:

name = people?.where(p => p.isselected).select(c => c.professionresults.select(n => n.name)).single().tostring() ?? null, id = people?.where(p => p.isselected).select(c => c.professionresults.select( => i.id)).single().tostring() ?? null 

but if know for sure return single unique record p => p.isselected every time.

i haven't tested it, let me know if works.