When IWebHostEnvironment is not injected, hostGetHostingEnvironment now returns an empty one instead of throwing exception

framework/src/Volo.Abp.AspNetCore/Microsoft/Extensions/DependencyInjection/AbpAspNetCoreServiceCollectionExtensions.cs

@@ -1,4 +1,6 @@
-using Microsoft.AspNetCore.Hosting;
+using System.Linq;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Hosting;
 
 namespace Microsoft.Extensions.DependencyInjection
 {
@@ -6,6 +8,14 @@ namespace Microsoft.Extensions.DependencyInjection
     {
         public static IWebHostEnvironment GetHostingEnvironment(this IServiceCollection services)
         {
+            if (!services.Any(d => d.ServiceType == typeof(IWebHostEnvironment)))
+            {
+                return new EmptyHostingEnvironment()
+                {
+                    EnvironmentName = Environments.Development
+                };
+            }
+
             return services.GetSingletonInstance<IWebHostEnvironment>();
         }
     }

framework/src/Volo.Abp.AspNetCore/Microsoft/Extensions/DependencyInjection/EmptyHostingEnvironment.cs

@@ -0,0 +1,19 @@
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.FileProviders;
+
+namespace Microsoft.Extensions.DependencyInjection;
+
+internal class EmptyHostingEnvironment : IWebHostEnvironment
+{
+    public string EnvironmentName { get; set; }
+
+    public string ApplicationName { get; set; }
+
+    public string WebRootPath { get; set; }
+
+    public IFileProvider WebRootFileProvider { get; set; }
+
+    public string ContentRootPath { get; set; }
+
+    public IFileProvider ContentRootFileProvider { get; set; }
+}