比如
Dictionary<string,string> headers = new Dictionary<string,string> ();
headers.Add("Content-Type", "application/json;charset=utf-8");
headers.Add("X-DhyanaAPI-AppId", "");
headers.Add("X-DhyanaAPI-AppKey", "");
string data = "";
byte[] bs = System.Text.UTF8Encoding.UTF8.GetBytes(data);
WWW getData = new WWW(_url,bs,headers);
这样可以加入header,但是这个请求是POST方法,可以在get请求中加上头部吗