csharp/protos/extest/unittest_rpc_interop.proto

// Additional options required for C# generation. File from copyright
// line onwards is as per original distribution.
import "google/protobuf/csharp_options.proto";
option (google.protobuf.csharp_file_options).namespace = "Google.ProtocolBuffers.TestProtos";
option (google.protobuf.csharp_file_options).umbrella_classname = "UnitTestRpcInterop";

option (google.protobuf.csharp_file_options).service_generator_type = IRPCDISPATCH;

option optimize_for = SPEED;

message SearchRequest {
  repeated string Criteria = 1;
}

message SearchResponse {
  message ResultItem {
    required string url = 1;
    optional string name = 2;
  }
  
  repeated ResultItem results = 1;
}

message RefineSearchRequest {
  repeated string Criteria = 1;
  required SearchResponse previous_results = 2;
}

service SearchService {
  /*
  Add this option to specify the GuidAttribute on the service interface
  option (google.protobuf.csharp_service_options).interface_id = "{A65F0925-FD11-4f94-B166-89AC4F027205}";
  */
  rpc Search (SearchRequest) returns (SearchResponse) 
  /*
  Add this option to specify the DispIdAttribute on the service interface
  { option (google.protobuf.csharp_method_options).dispatch_id = 5; } 
  */ ;
  
  rpc RefineSearch (RefineSearchRequest) returns (SearchResponse);
}