Maybe.cs

public struct Maybe<T>
{
    public static readonly Maybe<T> NoValue;

    public Maybe(T value, bool hasValue = true) : this()
    {
        HasValue = hasValue;
        Value = value;
    }

    public bool HasValue { get; private set; }

    public T Value { get; private set; }
}

public static class DictionaryExtensions
{
    public static Maybe<TValue> MaybeGetValue<TKey, TValue>(this IDictionary<TKey, TValue> dictionary, TKey key)
    {
        if (dictionary != null)
        {
            TValue value;
            if (dictionary.TryGetValue(key, out value))
                return new Maybe<TValue>(value);
        }

        return Maybe<TValue>.NoValue;
    }
}

A joy to have available in any solution! We have @jaredpar's Option in use over here.