using System;

using System.Collections.Generic;

using System.Linq;

using System.Text.RegularExpressions;

​

class Program

{

    static void Main()

    {

        //Your code goes here

        Dictionary<string,int> myDict = new Dictionary<string,int>();

        myDict.Add("hello",1);

        if (myDict?.TryGetValue("hello", out var val) == true)

        {               

            Console.WriteLine("Hello" + val.ToString());

        }

    }

}