using System;

using RestSharp;

public class Program

{

    public static void Main()

    {

        string url = "https://some/endpoint";

        string requestBody = "{\"name\": \"someName\"}";

        RestClient client = new RestClient(url);

        client.Timeout = -1;

        RestRequest request = new RestRequest(Method.POST);

        request.AddHeader("Authorization", "Bearer " + "token");

        //request.AddHeader("Content-Type", "application/json");

        //request.AddParameter("application/json", requestBody, ParameterType.RequestBody);

        request.AddJsonBody(requestBody);

        var response = client.ExecuteAsync(request).Result;

        Console.WriteLine($"response.Request.Body.ContentType: {response.Request.Body.ContentType}");

    }

}