emptyrecyclebin.cs

using System;
using System.Runtime.InteropServices;

class Test
{
    public const int SHERB_NOCONFIRMATION = 0x00000001;
    public const int SHERB_NOPROGRESSUI = 0x00000002;
    public const int SHERB_NOSOUND = 0x00000004;

    [DllImport("shell32.dll")]
    static extern int SHEmptyRecycleBin(IntPtr hwnd, string root, int flags);

    public static void Main(string[] args)
    {
        SHEmptyRecycleBin(IntPtr.Zero, null, 0);
    }
}