generate alternative BindService method

src/compiler/csharp_generator.cc

@@ -609,6 +609,39 @@ void GenerateBindServiceMethod(Printer* out, const ServiceDescriptor* service) {
   out->Print("\n");
 }
 
+void GenerateBindServiceWithBinderMethod(Printer* out,
+                                         const ServiceDescriptor* service) {
+  out->Print(
+      "/// <summary>Register service method implementations with a service "
+      "binder. Useful when customizing the service binding logic.</summary>\n");
+  out->Print(
+      "/// <param name=\"serviceBinder\">Service methods will be bound by "
+      "calling <c>AddMethod</c> on this object."
+      "</param>\n");
+  out->Print(
+      "/// <param name=\"serviceImpl\">An object implementing the server-side"
+      " handling logic.</param>\n");
+  out->Print(
+      "public static void BindService(grpc::ServiceBinderBase serviceBinder, "
+      "$implclass$ "
+      "serviceImpl)\n",
+      "implclass", GetServerClassName(service));
+  out->Print("{\n");
+  out->Indent();
+
+  for (int i = 0; i < service->method_count(); i++) {
+    const MethodDescriptor* method = service->method(i);
+    out->Print(
+        "serviceBinder.AddMethod($methodfield$, serviceImpl.$methodname$);\n",
+        "methodfield", GetMethodFieldName(method), "methodname",
+        method->name());
+  }
+
+  out->Outdent();
+  out->Print("}\n");
+  out->Print("\n");
+}
+
 void GenerateService(Printer* out, const ServiceDescriptor* service,
                      bool generate_client, bool generate_server,
                      bool internal_access) {
@@ -637,6 +670,7 @@ void GenerateService(Printer* out, const ServiceDescriptor* service,
   }
   if (generate_server) {
     GenerateBindServiceMethod(out, service);
+    GenerateBindServiceWithBinderMethod(out, service);
   }
 
   out->Outdent();