using System;

using System.Linq;

using System.Threading;

using System.Threading.Tasks;

using RestSharp;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(ExecuteRestApi("https://postman-echo.com/get", "GET", @"{""Authorization"":""Bearer asdfkjhgaskdjcbkaseyr""}", "").Result);

    }

    public static async Task<string> ExecuteRestApi(string url, string method, string headers, string body)

    {

        Console.WriteLine($"Start of the REST API execution {url}, {method}, {headers}, {body}");

        try

        {

            var uri = new Uri(url);

            var baseUri = uri.GetLeftPart(UriPartial.Authority);

​

            var options = new RestClientOptions(baseUri)  {ThrowOnAnyError = true, MaxTimeout = -1 };

            var client = new RestClient(options);

            var request = new RestRequest();

            request.Method = (Method)Enum.Parse(typeof(Method), method);

            if (!string.IsNullOrWhiteSpace(body))

            {

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

            }

​

            if (!string.IsNullOrWhiteSpace(headers))

            {

                var headersObj = System.Text.Json.Nodes.JsonNode.Parse(headers);

                foreach (var kv in headersObj.AsObject())

                {

                    request.AddHeader(kv.Key, kv.Value.ToString());

                }

            }

            var response = await client.ExecuteAsync(request);

            if (response.IsSuccessful)

            {

                return response.Content;

            }

            else

            {

                Console.WriteLine($"Failed to execute the REST API request {url}, {method}, {headers}, {body}");

            }

        }

        catch (Exception ex)

        {

            Console.WriteLine($"Failed to execute the REST API with exception. {url}, {method}, {headers}, {body} {ex.Message}");

        }

        finally

        {

            Console.WriteLine($"End of the REST API execution {url}, {method}, {headers}, {body}");

        }

​

        return string.Empty;

    }

}