gRPC not supported on Azure/IIS (#18374)

* gRPC not supported on Azure/IIS

* gRPC not supported on Azure/IIS

* gRPC not supported on Azure/IIS

Author: Rick-Anderson

aspnetcore/grpc/aspnetcore.md

@@ -12,6 +12,8 @@ uid: grpc/aspnetcore
 
 This document shows how to get started with gRPC services using ASP.NET Core.
 
+[!INCLUDE[](~/includes/gRPCazure.md)]
+
 ## Prerequisites
 
 # [Visual Studio](#tab/visual-studio)
@@ -119,7 +121,6 @@ The gRPC API provides access to some HTTP/2 message data, such as the method, ho
 
 [!code-csharp[](~/grpc/aspnetcore/sample/GrcpService/GreeterService2.cs?highlight=6-7&name=snippet)]
 
-[!INCLUDE[](~/includes/gRPCazure.md)]
 
 ## Additional resources
 

aspnetcore/grpc/basics.md

@@ -12,6 +12,8 @@ uid: grpc/basics
 
 This document outlines the concepts needed to write [gRPC](https://grpc.io/docs/guides/) apps in C#. The topics covered here apply to both [C-core](https://grpc.io/blog/grpc-stacks)-based and ASP.NET Core-based gRPC apps.
 
+[!INCLUDE[](~/includes/gRPCazure.md)]
+
 ## proto file
 
 gRPC uses a contract-first approach to API development. Protocol buffers (protobuf) are used as the Interface Design Language (IDL) by default. The *\*.proto* file contains:
@@ -70,8 +72,6 @@ By default, server and client assets are generated for each *\*.proto* file incl
 
 Similarly, the attribute is set to `Client` in client projects.
 
-[!INCLUDE[](~/includes/gRPCazure.md)]
-
 ## Additional resources
 
 * <xref:grpc/index>

aspnetcore/grpc/index.md

@@ -26,6 +26,8 @@ These benefits make gRPC ideal for:
 * Polyglot systems where multiple languages are required for development.
 * Point-to-point real-time services that need to handle streaming requests or responses.
 
+[!INCLUDE[](~/includes/gRPCazure.md)]
+
 ## C# Tooling support for .proto files
 
 gRPC uses a contract-first approach to API development. Services and messages are defined in *\*.proto* files:
@@ -116,8 +118,6 @@ A gRPC client is created using a channel, which represents a long-lived connecti
 
 For more information on creating clients, and calling different service methods, see <xref:grpc/client>.
 
-[!INCLUDE[](~/includes/gRPCazure.md)]
-
 ## Additional resources
 
 * <xref:grpc/basics>

aspnetcore/includes/gRPCazure.md

@@ -1,4 +1,2 @@
-## gRPC not supported on Azure App Service
-
 > [!WARNING]
 > [ASP.NET Core gRPC](xref:grpc/index) is not currently supported on Azure App Service or IIS. The HTTP/2 implementation of Http.Sys does not support HTTP response trailing headers which gRPC relies on. For more information, see [this GitHub issue](https://github.com/dotnet/AspNetCore/issues/9020).