diff --git a/Polly8Study.Core/GlobalUsing.cs b/Polly8Study.Core/GlobalUsing.cs
index eb4d3ae..f68ada5 100644
--- a/Polly8Study.Core/GlobalUsing.cs
+++ b/Polly8Study.Core/GlobalUsing.cs
@@ -1,14 +1,32 @@
-global using System.IO;
+global using System;
+global using System.IO;
+global using System.IO.Enumeration;
+global using System.Dynamic;
 global using System.Collections;
 global using System.Collections.Concurrent;
 global using System.Collections.Generic;
 global using System.Collections.Immutable;
 global using System.Collections.Specialized;
-global using System.Configuration;
 global using System.Diagnostics;
-global using System.Dynamic;
+
 global using System.Threading;
 global using System.Threading.Tasks;
+global using System.Threading.Channels;
+
+global using Microsoft.Extensions.DependencyInjection;
+global using Microsoft.Extensions.DependencyInjection.Extensions;
+global using Microsoft.Extensions.Configuration;
+global using Microsoft.Extensions.Configuration.Ini;
+global using Microsoft.Extensions.Configuration.Xml;
+global using Microsoft.Extensions.Configuration.Json;
+global using Microsoft.Extensions.Configuration.Memory;
+global using Microsoft.Extensions.Configuration.CommandLine;
+global using Microsoft.Extensions.Configuration.EnvironmentVariables;
+global using Microsoft.Extensions.Options;
+
+global using Microsoft.Extensions.Http;
+global using Microsoft.Extensions.Http.Logging;
+
 
 global using Polly;
 global using Polly.CircuitBreaker;
diff --git a/Polly8Study.Test/GlobalUsing.cs b/Polly8Study.Test/GlobalUsing.cs
index cd4383f..4b69839 100644
--- a/Polly8Study.Test/GlobalUsing.cs
+++ b/Polly8Study.Test/GlobalUsing.cs
@@ -4,11 +4,28 @@ global using System.Collections.Concurrent;
 global using System.Collections.Generic;
 global using System.Collections.Immutable;
 global using System.Collections.Specialized;
-global using System.Configuration;
 global using System.Diagnostics;
 global using System.Dynamic;
 global using System.Threading;
 global using System.Threading.Tasks;
+global using System.Threading.Channels;
+
+global using Microsoft.Extensions.DependencyInjection;
+global using Microsoft.Extensions.DependencyInjection.Extensions;
+global using Microsoft.Extensions.Configuration;
+global using Microsoft.Extensions.Configuration.Ini;
+global using Microsoft.Extensions.Configuration.Xml;
+global using Microsoft.Extensions.Configuration.Json;
+global using Microsoft.Extensions.Configuration.Memory;
+global using Microsoft.Extensions.Configuration.CommandLine;
+global using Microsoft.Extensions.Configuration.EnvironmentVariables;
+
+global using Microsoft.Extensions.Options;
+
+global using Microsoft.Extensions.Http;
+global using Microsoft.Extensions.Http.Logging;
+
+
 
 global using Xunit;
 global using Xunit.Sdk;