using RestSharp;

using System;

using System.Text.Json;

using System.Text.Json.Nodes;

public class Program

{

    public static void Main()

    {

        // send POST request with RestSharp

        var client = new RestClient("https://testapi.jasonwatmore.com");

        var request = new RestRequest("invalid-url");

        request.AddBody(new

        {

            name = "RestSharp POST Request Example"

        });     

        var response = client.ExecutePost(request);

        // handle error

        if (!response.IsSuccessful)

        {

            Console.WriteLine($"ERROR: {response.ErrorException?.Message}");

            return;

        }

​

        // deserialize json string response to JsonNode object

        var data = JsonSerializer.Deserialize<JsonNode>(response.Content!)!;

        // output result

        Console.WriteLine($"""

        ----------------

        json properties

        ----------------

        id: {data["id"]}

        createdAt: {data["createdAt"]}

​

        ----------------

        raw json data

        ----------------

        {data}

​

        ----------------

        Documentation at https://jasonwatmore.com/c-restsharp-http-post-request-examples-in-net

        """);

    }

}