Implementation for #654 + some updated offline test files

src/sdk/PnP.Core.Test.Common/Services/Core/TestPnPContextFactoryCollectionExtensions.cs

@@ -2,6 +2,8 @@
 using PnP.Core.Services;
 using PnP.Core.Services.Builder.Configuration;
 using System;
+using System.Net;
+using System.Net.Http;
 
 namespace PnP.Core.Test.Common.Services
 {
@@ -53,9 +55,22 @@ private static IServiceCollection AddHttpHandlers(this IServiceCollection collec
         private static IServiceCollection AddHttpClients(this IServiceCollection collection)
         {
             collection.AddHttpClient<SharePointRestClient>()
-                .AddHttpMessageHandler<SharePointRestRetryHandler>();
+                .AddHttpMessageHandler<SharePointRestRetryHandler>()
+                    // We use cookies by adding them to the header which works great when used from Core framework,
+                    // however when running the .NET Standard 2.0 version from .NET Framework we explicetely have to
+                    // tell the http client to not use the default (empty) cookie container
+                    .ConfigurePrimaryHttpMessageHandler(() => new HttpClientHandler()
+                    {
+                        UseCookies = false,
+                        AutomaticDecompression = DecompressionMethods.All,
+
+                    });
             collection.AddHttpClient<MicrosoftGraphClient>()
-                .AddHttpMessageHandler<MicrosoftGraphRetryHandler>();
+                .AddHttpMessageHandler<MicrosoftGraphRetryHandler>()
+                .ConfigurePrimaryHttpMessageHandler(() => new HttpClientHandler()
+                {
+                    AutomaticDecompression = DecompressionMethods.All,
+                });
 
             return collection;
         }