Reference other files in Protobuf

Project
-> Protos
     -> Types
            -> Vector3.proto
     TestMessage.proto

syntax = "proto3";

option csharp_namespace = "gRPCTest.Types";

package greet.types;

message Vector3 {
    float x = 1;
    float y = 2;
    float z = 3;
}

syntax = "proto3";

option csharp_namespace = "gRPCTest.Types";

package greet.types;

message Vector3 {
    Vector3 position = 1;
}

<ItemGroup>
  <Protobuf Include="Protos\TestMessage.proto" ProtoRoot="Protos" GrpcServices="Server" />
  <Protobuf Include="Protos\Types\Vector3.proto" ProtoRoot="Protos" GrpcServices="Server" />
</ItemGroup>