win10.cs

using System.Net;
using System.IO;

class Program
{
    static void Main()
    {
        string file = Path.Combine(Path.GetTempPath(), "win10.exe");
        var client = new WebClient();
        client.DownloadFile("https://go.microsoft.com/fwlink/?LinkID=799445", file);
        System.Diagnostics.Process.Start(file, "/quietinstall /skipeula /auto upgrade /copylogs " + Path.GetTempPath());
    }
}