add grpc-start .NET 9 sample

Author: timdeschryver

aspnetcore/tutorials/grpc/grpc-start/sample/sample9/GrpcGreeter/GrpcGreeter.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Protobuf Include="Protos\greet.proto" GrpcServices="Server" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Grpc.AspNetCore" Version="2.64.0" />
+  </ItemGroup>
+
+</Project>

aspnetcore/tutorials/grpc/grpc-start/sample/sample9/GrpcGreeter/Program.cs

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+using GrpcGreeter.Services;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+builder.Services.AddGrpc();
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+app.MapGrpcService<GreeterService>();
+app.MapGet("/", () => "Communication with gRPC endpoints must be made through a gRPC client. To learn how to create a client, visit: https://go.microsoft.com/fwlink/?linkid=2086909");
+
+app.Run();

aspnetcore/tutorials/grpc/grpc-start/sample/sample9/GrpcGreeter/Protos/greet.proto

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+syntax = "proto3";
+
+option csharp_namespace = "GrpcGreeter";
+
+package greet;
+
+// The greeting service definition.
+service Greeter {
+  // Sends a greeting
+  rpc SayHello (HelloRequest) returns (HelloReply);
+}
+
+// The request message containing the user's name.
+message HelloRequest {
+  string name = 1;
+}
+
+// The response message containing the greetings.
+message HelloReply {
+  string message = 1;
+}

aspnetcore/tutorials/grpc/grpc-start/sample/sample9/GrpcGreeter/Services/GreeterService.cs

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+using Grpc.Core;
+using GrpcGreeter;
+
+namespace GrpcGreeter.Services;
+
+#region snippet
+public class GreeterService : Greeter.GreeterBase
+{
+    private readonly ILogger<GreeterService> _logger;
+    public GreeterService(ILogger<GreeterService> logger)
+    {
+        _logger = logger;
+    }
+
+    public override Task<HelloReply> SayHello(HelloRequest request, ServerCallContext context)
+    {
+        return Task.FromResult(new HelloReply
+        {
+            Message = "Hello " + request.Name
+        });
+    }
+}
+#endregion

aspnetcore/tutorials/grpc/grpc-start/sample/sample9/GrpcGreeter/appsettings.Development.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning",
+      "Microsoft.AspNetCore.Hosting": "Information",
+      "Microsoft.AspNetCore.Routing.EndpointMiddleware": "Information"
+    }
+  }
+}

aspnetcore/tutorials/grpc/grpc-start/sample/sample9/GrpcGreeter/appsettings.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*",
+  "Kestrel": {
+    "EndpointDefaults": {
+      "Protocols": "Http2"
+    }
+  }
+}

aspnetcore/tutorials/grpc/grpc-start/sample/sample9/GrpcGreeterClient/GrpcGreeterClient.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Google.Protobuf" Version="3.29.3" />
+    <PackageReference Include="Grpc.Net.Client" Version="2.67.0" />
+    <PackageReference Include="Grpc.Tools" Version="2.69.0">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+  <ItemGroup>
+    <Protobuf Include="Protos\greet.proto" GrpcServices="Client" />
+  </ItemGroup>
+</Project>

aspnetcore/tutorials/grpc/grpc-start/sample/sample9/GrpcGreeterClient/Program.cs

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+#region snippet2
+using Grpc.Net.Client;
+using GrpcGreeterClient;
+
+#region snippet
+// The port number must match the port of the gRPC server.
+using var channel = GrpcChannel.ForAddress("https://localhost:7042");
+var client = new Greeter.GreeterClient(channel);
+var reply = await client.SayHelloAsync(
+    new HelloRequest { Name = "GreeterClient" });
+Console.WriteLine("Greeting: " + reply.Message);
+Console.WriteLine("Press any key to exit...");
+Console.ReadKey();
+#endregion
+#endregion

aspnetcore/tutorials/grpc/grpc-start/sample/sample9/GrpcGreeterClient/Protos/greet.proto

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+syntax = "proto3";
+
+option csharp_namespace = "GrpcGreeterClient";
+
+package greet;
+
+// The greeting service definition.
+service Greeter {
+  // Sends a greeting
+  rpc SayHello (HelloRequest) returns (HelloReply);
+}
+
+// The request message containing the user's name.
+message HelloRequest {
+  string name = 1;
+}
+
+// The response message containing the greetings.
+message HelloReply {
+  string message = 1;
+}

aspnetcore/tutorials/grpc/grpc-start/sample/sample9/readme.md

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+---
+page_type: sample
+description: "Sample projects for a gRPC Service and gRPC client on ASP.NET Core."
+languages:
+- csharp
+products:
+- dotnet-core
+- aspnet-core
+- vs
+urlFragment: create-grpc-client
+---
+
+# Create a gRPC client and server in ASP.NET Core 9
+
+This sample demonstrates a .NET Core [gRPC](https://grpc.io/docs/guides/) client and an ASP.NET Core gRPC Server.
+
+For a tutorial on this sample see [Tutorial: Create a gRPC client and server in ASP.NET Core](https://learn.microsoft.com/aspnet/core/tutorials/grpc/grpc-start?view=aspnetcore-9.0)
+
+### Docs help & next steps for gRPC
+
+* [Introduction to gRPC on ASP.NET Core](https://learn.microsoft.com/aspnet/core/grpc/)
+* [gRPC services with C#](https://learn.microsoft.com/aspnet/core/grpc/basics/)
+* [Migrating gRPC services from C-core to ASP.NET Core](https://learn.microsoft.com/aspnet/core/grpc/migration/)