How to create a WebPubSubServiceClient with .NET and Azure Identity

This how-to guide shows you how to create a WebPubSubServiceClient using Microsoft Entra ID in .NET.

• Install Azure.Identity from nuget.org.

  dotnet add package Azure.Identity
  

• Install Azure.Messaging.WebPubSub from nuget.org

  dotnet add package Azure.Messaging.WebPubSub
  

• If using DependencyInjection, install Microsoft.Extensions.Azure from nuget.org

  dotnet add package Microsoft.Extensions.Azure
  

1. Create a TokenCredential with Azure Identity SDK.

   using Azure.Identity;
   
   namespace chatapp
   {
       public class Program
       {
           public static void Main(string[] args)
           {
               var credential = new DefaultAzureCredential();
           }
       }
   }
   

   credential can be any class that inherits from TokenCredential class.

   • EnvironmentCredential
   • ClientSecretCredential
   • ClientCertificateCredential
   • ManagedIdentityCredential
   • VisualStudioCredential
   • VisualStudioCodeCredential
   • AzureCliCredential

   To learn more, see Azure Identity client library for .NET

2. Then create a client with endpoint, hub, and credential.

   using Azure.Identity;
   using Azure.Messaging.WebPubSub;
   
   public class Program
   {
       public static void Main(string[] args)
       {
           var credential = new DefaultAzureCredential();
           var client = new WebPubSubServiceClient(new Uri("<endpoint>"), "<hub>", credential);
       }
   }
   

   Or inject it into IServiceCollections with our BuilderExtensions.

   using System;
   
   using Azure.Identity;
   
   using Microsoft.Extensions.Azure;
   using Microsoft.Extensions.Configuration;
   using Microsoft.Extensions.DependencyInjection;
   
   namespace chatapp
   {
       public class Startup
       {
           public Startup(IConfiguration configuration)
           {
               Configuration = configuration;
           }
   
           public IConfiguration Configuration { get; }
   
           public void ConfigureServices(IServiceCollection services)
           {
               services.AddAzureClients(builder =>
               {
                   var credential = new DefaultAzureCredential();
                   builder.AddWebPubSubServiceClient(new Uri("<endpoint>"), "<hub>", credential);
               });
           }
       }
   }
   

   Learn how to use this client, see Azure Web PubSub service client library for .NET

• Simple chatroom with Microsoft Entra authorization