using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;

public class MainClass{
public static void Main(){
string FolderName = "Download";
var instanceType = Type.GetTypeFromProgID("Shell.Application");
dynamic shell = Activator.CreateInstance(instanceType);
var folder = shell.Namespace("shell:"+FolderName);
string directory = folder.Self.Path;
Console.WriteLine(directory);
}
}