using System;

using System.Net.Http;

using System.Threading.Tasks;

public class Program

{

    public async static Task Main()

    {

        Console.WriteLine("Version:"+ Environment.Version.ToString());

        var client = new HttpClient();

        var req = new HttpRequestMessage(HttpMethod.Get,"https://http2.akamai.com/demo")

        {

            Version = new Version(2, 0)

        };

​

        var x = await client.SendAsync(req);

        var resp = await x.Content.ReadAsStringAsync();

        Console.WriteLine(resp);

    }

}