How to send HTTP POST request in .NET (C#)? Problem with WebRequest and getting response

Hello everyone! I'm a beginner in C# and trying to send a POST request to an external API to pass JSON data and get a response. I've come across many examples, but they are either outdated (with WebRequest) or too complicated for me. Here's my current code that I've put together, but it doesn't work — I get the error "The remote server returned an error: (400) Bad Request" or it just hangs: ```csharp using System.Net; var request = (HttpWebRequest)WebRequest.Create("https://example.com/api/data"); request.Method = "POST"; request.ContentType = "application/json"; string json = "{\"name\":\"test\",\"value\":123}"; byte[] bytes = Encoding.UTF8.GetBytes(json); request.ContentLength = bytes.Length; using (var stream = request.GetRequestStream()) { stream.Write(bytes, 0, bytes.Length); } ```