How to create authentication header for Azure. This code came from Azure Resource manager training by Kevin Lam and David Tesar. This willl be help to any who wants to use Azure REST API and needs to generate authentication header

AzureAuthHeader

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
// you need to add project references to both Microsoft.IdentityModel.Clients.ActiveDirectory and 
// Microsoft.IdentityModel.Clients.ActiveDirectory.WinForms 
using Microsoft.IdentityModel.Clients.ActiveDirectory;
using System.Threading;

namespace GenerateAzureAuthHeader
{
class Program
    {
        static void Main(string[] args)
        {
            var tenantId = "your tenant id"; // Use Get-AzureAccount cmdlet to get tenant id
            var clientId = "1950a258-227b-4e31-a9cf-717495945fc2";
            var authUrl = "https://login.windows.net";
            var header = GetAuthorizationHeader(tenantId, authUrl, clientId);
            Console.Write(header);
        }

        private static string GetAuthorizationHeader(string tenantId, string authUrlHost, string clientId)
        {
            AuthenticationResult result = null;
            var thread = new Thread(() =>
            {
                try
                {
                    var authUrl = String.Format(authUrlHost + "/{0}", tenantId);
                    var context = new AuthenticationContext(authUrl);

                    result = context.AcquireToken(
                        resource: "https://management.core.windows.net/",
                        clientId: clientId,
                        redirectUri: new Uri("urn:ietf:wg:oauth:2.0:oob"),
                        promptBehavior: PromptBehavior.Auto);
                }
                catch (Exception threadEx)
                {
                    Console.WriteLine(threadEx.Message);
                }
            });

            thread.SetApartmentState(ApartmentState.STA);
            thread.Name = "AcquireTokenThread";
            thread.Start();
            thread.Join();

            return result.CreateAuthorizationHeader();
        }
    }
}