Microsoft Graph building Class Library

This post shows you how to build a Class Library with Microsoft Graph SDK. The pre-requisites of the article are you need to have Visual Studio, you have to know C#, and you need to have an Office 365 account. Start Visual Studio, create a new project, select Class Library project. Go to Tools -> NuGet Package Manager -> Package Manager Console. Type

Install-Package Microsoft.Graph

Paste the following code to your library.

using Microsoft.Graph;

using Microsoft.Graph.Auth;

using Microsoft.Identity.Client;

using System.Collections.Generic;

using System.Threading.Tasks;

namespace ClassLibraryGraph


public class MSGraph


        public static List<string> lstString = new List<string>();

        public static async Task<List<string>> CallRunAsync()


            await Run();

            return lstString;


        public static async Task Run()


            var clientId = “7515c9fd-d9d2-4aa5-b960-d5b3c0032502”;

            var scopes = new List<string>() { “User.ReadBasic.All” }.ToArray();

            IPublicClientApplication clientApplication = InteractiveAuthenticationProvider.CreateClientApplication(clientId);

            InteractiveAuthenticationProvider authProvider = new InteractiveAuthenticationProvider(clientApplication, scopes);

            GraphServiceClient graphClient = new GraphServiceClient(authProvider);

            var users = await graphClient.Users

.        Request()

.        Select(e => new








            foreach (var user in users)









About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
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