Question

When dealing with the HttpRequestMessage, does the Content field always have to be non-null? If yes, then what If I want to send an empty body? How would one specify that?

For example, with a DELETE or GET request.

Answer 1

It definitely should allow an empty content. As you quite rightly point out, DELETE and GET never have content bodies, and there’s no strict requirement to have one for POST either.

I usually use HttpClient, and just use an empty StringContent, e.g.

var response = _connection.Client.PostAsync(path, new StringContent(string.Empty)).Result;