Send Empty object as Data of length and not RST_STREAM

[HighOnLemonz]

Hi,
I have a proto file with the following rpc:
rpc MethodToCall(ObjectToReceive) returns (Empty);
where Empty is declared in the proto file as:
message Empty {}.

After using Grpc.Tools to generate the files I have override this method as follows:
public override Task MethodToCall(ObjectToReceive request, ServerCallContext context)
{
return Task.FromResult(new Empty());
}

In wireshark the response looks like this:

Problem is that what I need is the response to have an actual Data field of length 0 as follows:

where the Data is:

I am using .Net Framework 4.7.2.
Can I force the library to send the response like this or it will always decide not to send irrelevant data.

Thank you

[JamesNK]

I don't know why you're seeing a RST_STREAM. If a request sends a response message, even an empty one, then the response should end with a HEADERS frame with END_STREAM set.