ConcurrentDictionary<T>, C#

ConcurrentDictionary<T>

//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

//
//=======================================================
//          Code Examples from Exam Ref 70-483
//=======================================================
//
//AUTHOR: Wouter de Kort
//
//SECTION: Objective 1.1 - Chapter 1
//
//MODIFICATION HISTORY
//DATE          NAME                DESCRIPTION
//-----------   ----------------    --------------------
//10/19/2017    Cristian Canedo     Initial commit 
//=======================================================

using System;
using System.Collections.Concurrent;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            var dict = new ConcurrentDictionary<string, int>();
            
            if (dict.TryAdd("k1", 42))
            {
                Console.WriteLine("Added");
            }
            
            if (dict.TryUpdate("k1", 21, 42))
            {
                Console.WriteLine("42 updated to 21");
            }
            
            dict["k1"] = 42; //overwriting unconditionally
            
            dict.AddOrUpdate("k1", 3, (s, i) => i * 2);
            dict.GetOrAdd("k2", 3);
            
            int result;
            if (dict.TryGetValue("k2", out result))
                Console.WriteLine(result);

}
    }
}


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