c# - Linq searching list of objects -

i have class:

public class examreviewrequested {     public list<examreviewrequest> reviews { get; set;} } 

it's reviews property has list of class:

public class examreviewrequest {     public string eventcode { get; set; }     public bool requested { get; set; } } 

how search specific eventcode , return selected examreviewrequest eventcode using linq? in view, both these (row.eventcode has value want search for):

examreviewrequest er = viewbag.examreviews.single(x => x.eventcode == row.eventcode)  examreviewrequest er = viewbag.examreviews.reviews.firstordefault(x => x.eventcode == row.eventcode) 

return error:

cannot use lambda expression argument dynamically dispatched operation without first casting delegate or expression tree type 

i've looked @ several posts concerning subject can't make of them work.

when assign examreviews viewbag become dynamic object no type setting. error message telling you need cast first use linq.

what do

i can't see assign viewbag.examreviews if it's of type ienumerable<examreviewrequest> then:

var examreviews = (ienumerable<examreviewrequest>)viewbag.examreviews var examreviewrequest = examreviews.single(x => x.eventcode == row.eventcode) 

or if it's of type examreviewrequested then:

var examreviews = (examreviewrequested)viewbag.examreviews var examreviewrequest = examreviews.requests.single(x => x.eventcode == row.eventcode) 

what should do

you shouldn't assign list<examviewrequest> / examreviewrequested viewbag. way do:

// code set model previous var examreviewrequested = model.examreviews.single(x => x.eventcode == row.eventcode); 

where model of type examreviewrequested