// Online C# Editor for free

// Write, Edit and Run your C# code using C# Online Compiler

​

using System;

using System.Threading.Tasks;

using System.Net.Http;

using System.Text;

using System.Text.Json;

​

namespace API {

​

    public class HelloWorld

    {

        public static void Main(string[] args)

        {

            Console.WriteLine ("Hello Mono World");

            //PostEntry t = new PostEntry();

            //t.Call();

            GetEntry t = new GetEntry();

            t.Call();

            Console.ReadLine();

​

​

        }

        class Person {

            public string name { get; set; }

            public string ocupation { get; set; }

            public Person(string name_, string ocupation_){

                name=name_;

                ocupation=ocupation_;

            }

        }

​

        class Program

        {

            public async Task ShowAsync()

            {

                using var client = new HttpClient();

​

                var result = await client.GetAsync("http://webcode.me");

                Console.WriteLine(result.StatusCode);

            }

​

            public async void Call()

            {

                try

                {

                    await ShowAsync();

                }

                catch (Exception ex)

                {

                    Console.WriteLine(ex.Message);

                }

            }

        }

​

        class GetEntries

        {

            public async Task GetAsync()

            {

                using var client = new HttpClient();

                var msg = new HttpRequestMessage(HttpMethod.Get, "https://api.publicapis.org/entries");

                msg.Headers.Add("User-Agent", "C# Program");

                var res = await client.SendAsync(msg);

                var content = await res.Content.ReadAsStringAsync();

                Console.WriteLine(content);

            }

​

            public async void Call()

            {

                try

                {

                    await GetAsync();

                }

                catch (Exception ex)

                {

                    Console.WriteLine(ex.Message);

                }

            }

        }

​

​

        class GetEntry

        {

            public async Task GetAsync()

            {

​

                var u = "https://httpbin.org/get";

​

                using var client = new HttpClient();

​

                var builder = new UriBuilder(u);

                builder.Query = "name=John Doerr";

                var url = builder.ToString();

​

                var res = await client.GetAsync(url);

​

                var content = await res.Content.ReadAsStringAsync();

                Console.WriteLine(content);

​

            }

​

            public async void Call()

            {

                try

                {

                    await GetAsync();

                }

                catch (Exception ex)

                {

                    Console.WriteLine(ex.Message);

                }

            }

        }

        class GetEntryJSON

        {

            public async Task GetAsync()

            {

​

                var u = "https://httpbin.org/get";

​

                using var client = new HttpClient();

                var content = new StringContent("JSON Content");

                content.Headers.Add("header-name", "header value");

​

                var builder = new UriBuilder(u);

                builder.Query = "name=John Doerr";

                var url = builder.ToString();

​

                var res = await client.GetAsync(url);

​

                var content = await res.Content.ReadAsStringAsync();

                Console.WriteLine(content);

​

            }

​

            public async void Call()

            {

                try

                {

                    await GetAsync();

                }

                catch (Exception ex)

                {

                    Console.WriteLine(ex.Message);

                }

            }

        }

​

        public class PostEntry

        {

            public async Task PostAsync()

            {

​

                Person persona = new Person("John Doerr", "gardener");

​

                string jsonString = JsonSerializer.Serialize(persona);

                var data = new StringContent(jsonString, Encoding.UTF8, "application/json");

​

                var url = "https://httpbin.org/post";

                using var client = new HttpClient();

​

                var response = await client.PostAsync(url, data);

​

                var result = await response.Content.ReadAsStringAsync();

                Console.WriteLine(result);

​

                //record Person(string Name, string Occupation);

​

            }

​

            public async void Call()

            {

                try

                {

                    await PostAsync();

                }

                catch (Exception ex)

                {

                    Console.WriteLine(ex.Message);

                }

            }

        }

    }

}