c# - Multi nested FirstOrDefault -

i have following model:

public class stredisko {     public string name { get; set; }     public observablecollection<substredisko> pracoviska { get; set; }     public observablecollection<substredisko> dohodari { get; set; } } public class substredisko {     public string name { get; set; }     public string code { get; set; }      public vyplatnepasky vyplatnapaska { get; set; }     public mzdovenaklady mzdovenaklady { get; set; }     public poistne poistne { get; set; } } 

i trying run super simple linq query should return first element matches following condition:

var sstredisko = strediska.firstordefault(                     n => n.pracoviska.firstordefault(x=>x.name == "somename")); 

i run condition against: observablecollection<stredisko> strediska

however unknown reason (to me) gives me following error: cannot implicitly convert type 'substredisko' 'bool'.

what doing wrong?

you're looking enumerable.any:

var sstredisko = strediska.firstordefault(                               n => n.pracoviska.any(x => x.name == "somename")); 

firstordefault yield first element matches predicate. want match against first element , yield bool indicating match has been found, any does.