DictSelect.cs

public static Dictionary<U,T> dictConvert<U,T>(Dictionary<U,object> input)
        {
            var outp = new Dictionary<U, T>();
            foreach (var item in input.Keys)
            {
                if (input[item].GetType() != typeof(T))
                    continue;
                if (!outp.ContainsKey(item))
                    outp.Add(item, (T)input[item]);
                else
                    outp[item] = (T)input[item];
            }
            return outp;
        }