这个范例代码演示了如何在Console Application中完整地实现Azure AD 2.0身份认证，并且保存身份。

MicrosoftGraph-ConsoleApplication.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Identity.Client;
using Microsoft.Graph;
using System.Net.Http;

/// <summary>
/// 这个范例代码演示了如何在Console Application中完整地实现Azure AD 2.0身份认证，并且保存身份。
/// 作者：陈希章
/// 时间：2017年11月13日
/// 说明：需要引用Microsoft.Identity.Client（MSAL，当前是prerelease状态）,Microsoft.Graph这两个Package
/// </summary>
namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            IUser user = null;
            string CacheFilePath = System.Reflection.Assembly.GetExecutingAssembly().Location + ".msalcache.txt";
            object FileLock = new object();

            var tokenCache = new TokenCache();
            tokenCache.SetBeforeAccess((_args) => {
                //反序列化
                lock (FileLock)
                {
                    
                    _args.TokenCache.Deserialize(System.IO.File.Exists(CacheFilePath)
                        ? System.IO.File.ReadAllBytes(CacheFilePath)
                        : null);
                }

            });
            tokenCache.SetAfterAccess((_args) =>
            {
                //序列化
                if (_args.TokenCache.HasStateChanged)
                {
                    lock (FileLock)
                    {
                        System.IO.File.WriteAllBytes(CacheFilePath, _args.TokenCache.Serialize());
                        _args.TokenCache.HasStateChanged = false;
                    }
                }
            });

            var client = new PublicClientApplication("a1d42c27-29c4-4e8b-b08c-1ee417f2aa40", "https://login.microsoftonline.com/common/oauth2/authorize", tokenCache);
            if (client.Users != null && client.Users.Count() > 0)
                user = client.Users.First();
            

            var graph = new GraphServiceClient(new DelegateAuthenticationProvider(async(request)=> {

                var scope = new string[] { "user.read","mail.read","mail.send" };
                AuthenticationResult token = null;
                try
                {
                    token = await client.AcquireTokenSilentAsync(scope, user);
                }
                catch (Exception ex)
                {
                    token = await client.AcquireTokenAsync(scope);
                    user = token.User;

                }

                request.Headers.Add("Authorization", $"Bearer {token.AccessToken}");
            }));



            var me = graph.Me.Request().GetAsync().Result;
            Console.WriteLine(me.DisplayName);
            var messages = graph.Me.Messages.Request().GetAsync().Result;
            Console.WriteLine(string.Join(Environment.NewLine, messages.Select(x => x.Subject)));
            Console.Read();
        }

    }






}