Lazy exception caching, C#

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using System;
using System.Collections.Concurrent;
using System.Threading;
using System.Threading.Tasks;
using System.Net;

namespace Rextester
{
    public class Program
    {
        public class LightsaberProvider
        {
            private static int _firstTime = 1;

public LightsaberProvider()
            {
                Console.WriteLine("LightsaberProvider ctor");
            }

public string GetFor(string jedi)
            {
				Console.WriteLine("LightsaberProvider.GetFor jedi: {0}", jedi);

Thread.Sleep(TimeSpan.FromSeconds(1));
                if (jedi == "2" && 1 == Interlocked.Exchange(ref _firstTime, 0))
                {
                    throw new Exception("Dark side happened...");
                }

Thread.Sleep(TimeSpan.FromSeconds(1));
                return string.Format("Lightsaver for: {0}", jedi);
            }
        }

public class LightsabersCache
        {
            private readonly LightsaberProvider _lightsaberProvider;
            private readonly ConcurrentDictionary<string, Lazy<string>> _producedLightsabers;

public LightsabersCache(LightsaberProvider lightsaberProvider)
            {
                _lightsaberProvider = lightsaberProvider;
                _producedLightsabers = new ConcurrentDictionary<string, Lazy<string>>();
            }

public string GetLightsaber(string jedi)
            {
                Lazy<string> result;
                if (!_producedLightsabers.TryGetValue(jedi, out result))
                {
                    result = _producedLightsabers.GetOrAdd(jedi, key => new Lazy<string>(() =>
                    {
                        Console.WriteLine("Lazy Enter");
                        var light = _lightsaberProvider.GetFor(jedi);
                        Console.WriteLine("Lightsaber produced");
                        return light;
                    }, LazyThreadSafetyMode.ExecutionAndPublication));
                }
                return result.Value;
            }
        }
        
        public static void Main(string[] args)
        {
            Test();
            Console.WriteLine("Maximum 1 'Dark side happened...' strings on the console there should be. No more, no less.");
            Console.WriteLine("Maximum 5 lightsabers produced should be. No more, no less.");
        }

private static void Test()
        {
            var cache = new LightsabersCache(new LightsaberProvider());

Parallel.For(0, 15, t =>
            {
                for (int i = 0; i < 10; i++)
                {
                    try
                    {
                        var result = cache.GetLightsaber((t % 5).ToString());
                    }
                    catch (Exception e)
                    {
                        Console.WriteLine(e.Message);
                    }
                    Thread.Sleep(25);
                }
            });
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0.17 sec, absolute running time: 4.09 sec, cpu time: 0.08 sec, average memory usage: 25 Mb, average nr of threads: 13