Locking pattern for proper use of .NET MemoryCache

Question

I assume this code has concurrency issues:

const string CacheKey = \"CacheKey\";
static string GetCachedData()
{
    string expensiveString =null;
    if (Me         


        

Answer 1

Console example of MemoryCache, "How to save/get simple class objects"

Output after launching and pressing Any key except Esc :

Saving to cache!
Getting from cache!
Some1
Some2

    class Some
    {
        public String text { get; set; }

        public Some(String text)
        {
            this.text = text;
        }

        public override string ToString()
        {
            return text;
        }
    }

    public static MemoryCache cache = new MemoryCache("cache");

    public static string cache_name = "mycache";

    static void Main(string[] args)
    {

        Some some1 = new Some("some1");
        Some some2 = new Some("some2");

        List list = new List();
        list.Add(some1);
        list.Add(some2);

        do {

            if (cache.Contains(cache_name))
            {
                Console.WriteLine("Getting from cache!");
                List list_c = cache.Get(cache_name) as List;
                foreach (Some s in list_c) Console.WriteLine(s);
            }
            else
            {
                Console.WriteLine("Saving to cache!");
                cache.Set(cache_name, list, DateTime.Now.AddMinutes(10));                   
            }

        } while (Console.ReadKey(true).Key != ConsoleKey.Escape);

    }