Make IIS benchmarks work again (#1415)

Author: jkotalik

src/Benchmarks/Benchmarks.csproj

@@ -67,7 +67,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv" Version="$(MicrosoftAspNetCoreAppPackageVersion)" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="$(MicrosoftAspNetCoreAppPackageVersion)" />
 
-    <!--<PackageReference Include="Microsoft.AspNetCore.Server.IntegrationTesting.IIS" Version="$(MicrosoftAspNetCoreAppPackageVersion)" />-->
+    <PackageReference Include="Microsoft.AspNetCore.Server.IntegrationTesting.IIS" Version="5.0.0-alpha1.19468.7" />
 
     <FrameworkReference Update="Microsoft.AspNetCore.App" RuntimeFrameworkVersion="$(MicrosoftAspNetCoreAppPackageVersion)" />
 

src/Benchmarks/Program.cs

@@ -172,16 +172,16 @@ public static void Main(string[] args)
             {
                 webHostBuilder = webHostBuilder.UseHttpSys();
             }
-//#if NETCOREAPP2_2 || NETCOREAPP3_0
-//            else if (String.Equals(Server, "IISInProcess", StringComparison.OrdinalIgnoreCase))
-//            {
-//                webHostBuilder = webHostBuilder.UseIIS();
-//            }
-//#endif
-//            else if (String.Equals(Server, "IISOutOfProcess", StringComparison.OrdinalIgnoreCase))
-//            {
-//                webHostBuilder = webHostBuilder.UseKestrel().UseIISIntegration();
-//            }
+#if NETCOREAPP2_2 || NETCOREAPP3_0
+           else if (String.Equals(Server, "IISInProcess", StringComparison.OrdinalIgnoreCase))
+           {
+               webHostBuilder = webHostBuilder.UseIIS();
+           }
+#endif
+           else if (String.Equals(Server, "IISOutOfProcess", StringComparison.OrdinalIgnoreCase))
+           {
+               webHostBuilder = webHostBuilder.UseKestrel().UseIISIntegration();
+           }
             else
             {
                 throw new InvalidOperationException($"Unknown server value: {Server}");