Anzahl der Dateien im Papierkorb zählen

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// using System.Runtime.InteropServices;

[DllImport("shell32.dll")]
static extern int SHQueryRecycleBin(string pszRootPath, ref SHQUERYRBINFO pSHQueryRBInfo);

[StructLayout(LayoutKind.Explicit, Size = 20)]
public struct SHQUERYRBINFO
{
    [FieldOffset(0)]
    public int cbSize;
    [FieldOffset(4)]
    public long i64Size;
    [FieldOffset(12)]
    public long i64NumItems;
}

public static int GetCount()
{
    SHQUERYRBINFO sqrbi = new SHQUERYRBINFO();
    sqrbi.cbSize = Marshal.SizeOf(typeof(SHQUERYRBINFO));
    int hresult = SHQueryRecycleBin(string.Empty, ref sqrbi);
    return (int)sqrbi.i64NumItems;
}