How to get around lack of covariance with IReadOnlyDictionary?

Question

I\'m trying to expose a read-only dictionary that holds objects with a read-only interface. Internally, the dictionary is write-able, and so are the objects within (see belo

Answer 1

Another approach for a specific lack of covariance:

A work around for a specific type of useful covariance on idictionary

public static class DictionaryExtensions
    {
        public static IReadOnlyDictionary> ToReadOnlyDictionary(
            this IDictionary> toWrap)
        {
            var intermediate = toWrap.ToDictionary(a => a.Key, a =>a.Value!=null? a.Value.ToArray().AsEnumerable():null);
            var wrapper = new ReadOnlyDictionary>(intermediate);
            return wrapper;
        }   
    }