C# Online Compiler | .NET Fiddle

using System;
using System.Collections.Generic;
					
public class Program
{
	public static void Main()
	{
		Dictionary<int, string> myDictionary = new Dictionary<int, string>();

		myDictionary.Add(3, "about");
		myDictionary.Add(1, "who");
		myDictionary.Add(4, "order");
		myDictionary.Add(2, "cares");
		
		Console.WriteLine("standard dictionary:");

		foreach (KeyValuePair<int, string> kvp in myDictionary)
		{
			Console.WriteLine("Key = {0}, Value = {1}",
							  kvp.Key, kvp.Value);
		}
		
		Console.WriteLine();

		SortedDictionary<int, string> mySortedDictionary = new SortedDictionary<int, string>();

		mySortedDictionary.Add(3, "about");
		mySortedDictionary.Add(1, "who");
		mySortedDictionary.Add(4, "order");
		mySortedDictionary.Add(2, "cares");
		
		Console.WriteLine("sorted dictionary:");

		foreach (KeyValuePair<int, string> kvp in mySortedDictionary)
		{
			Console.WriteLine("Key = {0}, Value = {1}",
							  kvp.Key, kvp.Value);
		}
	}
}

 
using System;
using System.Collections.Generic;
                    
public class Program
{
    public static void Main()
    {
        Dictionary<int, string> myDictionary = new Dictionary<int, string>();
​
        myDictionary.Add(3, "about");
        myDictionary.Add(1, "who");
        myDictionary.Add(4, "order");
        myDictionary.Add(2, "cares");
        
        Console.WriteLine("standard dictionary:");
​
        foreach (KeyValuePair<int, string> kvp in myDictionary)
        {
            Console.WriteLine("Key = {0}, Value = {1}",
                              kvp.Key, kvp.Value);
        }
        
        Console.WriteLine();
​
        SortedDictionary<int, string> mySortedDictionary = new SortedDictionary<int, string>();
​
        mySortedDictionary.Add(3, "about");
        mySortedDictionary.Add(1, "who");
        mySortedDictionary.Add(4, "order");
        mySortedDictionary.Add(2, "cares");
        
        Console.WriteLine("sorted dictionary:");
​
        foreach (KeyValuePair<int, string> kvp in mySortedDictionary)
        {
            Console.WriteLine("Key = {0}, Value = {1}",
                              kvp.Key, kvp.Value);
        }
    }
}

Unhandled exception. System.Net.Http.HttpRequestException: Cannot assign requested address (localhost:5001)
---> System.Net.Sockets.SocketException (99): Cannot assign requested address
   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException(SocketError error, CancellationToken cancellationToken)
   at System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.System.Threading.Tasks.Sources.IValueTaskSource.GetResult(Int16 token)
   at System.Net.Sockets.Socket.<ConnectAsync>g__WaitForConnectWithCancellation|285_0(AwaitableSocketAsyncEventArgs saea, ValueTask connectTask, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.ConnectToTcpHostAsync(String host, Int32 port, HttpRequestMessage initialRequest, Boolean async, CancellationToken cancellationToken)
   --- End of inner exception stack trace ---
   at System.Net.Http.HttpConnectionPool.ConnectToTcpHostAsync(String host, Int32 port, HttpRequestMessage initialRequest, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.ConnectAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.CreateHttp11ConnectionAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.InjectNewHttp11ConnectionAsync(QueueItem queueItem)
   at System.Threading.Tasks.TaskCompletionSourceWithCancellation`1.WaitWithCancellationAsync(CancellationToken cancellationToken)
   at System.Net.Http.HttpConnectionPool.SendWithVersionDetectionAndRetryAsync(HttpRequestMessage request, Boolean async, Boolean doRequestAuth, CancellationToken cancellationToken)
   at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, Boolean async, CancellationToken cancellationToken)
   at System.Net.Http.HttpClient.<SendAsync>g__Core|83_0(HttpRequestMessage request, HttpCompletionOption completionOption, CancellationTokenSource cts, Boolean disposeCts, CancellationTokenSource pendingRequestsCts, CancellationToken originalCancellationToken)
   at AA04.Program.LoginAsync(LoginRequestDto loginRequestDto)
   at AA04.Program.Main(String[] args)
   at AA04.Program.<Main>(String[] args)
Command terminated by signal 6