Returning a list of keys with ModelState errors

Question

How can I return a list/array of all keys that have an error?

I have tried to do the below, but it says I can't have that sort of expression for some reason.

ModelState.ToList(item => item.Value.Errors.Count > 0)

Mumble

Answer 1

var errors = from modelstate in ModelState.AsQueryable().Where(f => f.Value.Errors.Count > 0) select new  {  Title = modelstate.Key  };

Mumble

Answer 2

Count is a method. You need ()s after is. But I'd prefer Any, anyway:

from item in ModelState
where item.Value.Errors.Any()
select item.Key

Extinguisher

No overload for method 'ToList' takes '1' arguments – Mumble

I also just want the keys collection returned not the KeyValuePair collection – Mumble

I rewrote your code as LINQ. This is from memory, so I don't guarantee no errors or typos. – Extinguisher