using System.Collections.Generic;
public static void Main()
Console.WriteLine("Hello World");
var test = new Dictionary<string, List<string>>() {
{ "test", new List<string>() { "test2", "test3" } }
var oho=test.SelectMany(pair => pair.Value.Select(str => Tuple.Create(pair.Key, str))).ToList();
foreach(var ohoho in oho)
Console.WriteLine(ohoho);