using System;
using System.Collections.Generic;

public class Test
{
    public static void Main()
    {
        Dictionary<string, string> myDict = new Dictionary<string, string>();
        myDict.Add("A", "value1");
        myDict.Add("a", "value2");
        foreach (var kvp in myDict)
        {
            Console.WriteLine(kvp.Key + ": " + kvp.Value);
        }
    }
}