using System;

using System.Text;

using System.Net.Http;

using System.Threading.Tasks;

public class Program

{

    public static async Task Main()

    {

        using HttpClient client = new HttpClient();

        using HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, "https://github.com");

        request.Content = new StringContent("Example content", Encoding.UTF8, "text/plain");

        using HttpResponseMessage response = await client.SendAsync(request);

        Console.WriteLine("Response received");

    }

}