Working with Dictionaries (csharp), C#

Working with Dictionaries (csharp)

//Title of this code
//Rextester.Program.Main is the entry point for your code. Don't change it.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            //Your code goes here
            Console.WriteLine("Hello, world!");
            
            Dictionary<string, int> myDict = new Dictionary<string, int>() {
                {"car", 20}, {"bus", 8}, {"lorries", 10}
            };
            
            myDict.Add("bicycles", 5);
            
            foreach (KeyValuePair<string, int> pair in myDict) {
                Console.WriteLine(string.Format("{0}, {1}", pair.Key, pair.Value));
            }
            foreach (var pair in myDict) {
                Console.WriteLine(string.Format("{0}, {1}", pair.Key, pair.Value));
            }
            
            if (myDict.ContainsKey("bicycles")) {
                Console.WriteLine(string.Format("myDict contains bicycles!"));
            }
            if (myDict.ContainsValue(20)) {
                foreach (var pair in myDict) {
                    if (pair.Value == 20) Console.WriteLine(string.Format("value 20 belongs to the key \"{0}\"",pair.Key));
                }
            }
            
            int getValue; 
            // this is a test that returns true/false if the key exists or not
            // if it exists, it will output the value and put it into getValue
            Console.WriteLine(myDict.TryGetValue("monster", out getValue)); 
            if (myDict.TryGetValue("car", out getValue)) {
                Console.WriteLine(string.Format("myDict[\"car\"] is {0}", getValue));
                Console.WriteLine(string.Format("myDict[\"car\"] is {0}", myDict["car"]));
            }
            
        }
    }
}


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