如何使用WebRequest发送字符串数组

Question

我的控制器中有一个接受字符串数组的方法： public async Task<HttpResponseMessage> PostData(string[] data)

我想使用控制台应用程序向我的api发送请求，但我得到了404响应并且没有到达控制器：

WebRequest request = WebRequest.Create("http://localhost:1119/api/psr");
request.Method = "POST";
string num= "[ \"89\",\"21\" , \"2A,\" ]";

                ASCIIEncoding encoding = new ASCIIEncoding();
                byte[] data = encoding.GetBytes(num);

                request.ContentType = "application/x-www-form-urlencoded";

                request.ContentLength = data.Length;

                Stream dataStream = request.GetRequestStream();

                dataStream.Write(data, 0, data.Length);

                dataStream.Close();

                WebResponse response = request.GetResponse();