using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Dictionary<string, Foo> dict = new Dictionary<string, Foo>();

        dict.Add("A", new Foo("a"));

        dict.Add("B", new Foo("bb"));

        dict.Add("C", new Foo("ccc"));

​

        var resultArray = dict.Values.Select(r => r.ToUpper()).ToArray();

        foreach (var s in resultArray)

            Console.WriteLine(s);

    }

    public class Foo

    {

        public Foo(string s)

        {

            name = s;

        }

        public string ToUpper()

        {

            return name.ToUpper();

        }

        public string name;

    }

}