您还没有提出请求.在此处添加标头提出请求.

You haven't made a request yet. The Headers get added here when you make a request.

另一种添加标头的方法是使用请求过滤器，例如:

An alternative way to add headers is to use the Request filters, e.g:

client.RequestFilter = httpReq => {
    httpReq.Headers.Add ("X-Parse-Application-Id", "XXXXXX");
    httpReq.Headers.Add ("X-Parse-REST-API-Key", "XXXXXX");
};

有效地做同样的事情.