C# と VB.NET の質問掲示板

> 過去ログに下記内容があったんですが、解決はされてないんですよね(＾＾;
> .NETでExcelの値のみをコピー
> http://bbs.wankuma.com/index.cgi?mode=al2&namber=24586&KLOG=46
過去ログ見ましたが、このコードで何でダメだったんでしょうね。
VS 2008 SP1、Office 2007 ですが、下記のコードで問題無く動作しました。（C# でスイマセン）
※あくまで検証用のコードなので、解放処理は適切に実装して下さい。
以下コード

using System;
using System.Runtime.InteropServices;

using Excel = Microsoft.Office.Interop.Excel;

class Program
{
  static void Main(string[] args)
  {
    Excel.Application app = new Excel.Application();
    Excel.Workbooks books = app.Workbooks;
    Excel.Workbook book = books.Open("D:\\test.xlsx", Type.Missing, Type.Missing, 
      Type.Missing, Type.Missing, Type.Missing, Type.Missing, 
      Type.Missing, Type.Missing, Type.Missing, Type.Missing, 
      Type.Missing, Type.Missing, Type.Missing, Type.Missing);
    Excel.Sheets sheets = book.Sheets;
    Excel.Worksheet sheet = sheets[1] as Excel.Worksheet;
    Excel.Range cells = sheet.Cells;
    Excel.Range srcRange = cells[2, 1] as Excel.Range;
    srcRange.Copy(Type.Missing);

    Excel.Workbook book2 = books.Add(Type.Missing);
    Excel.Sheets sheets2 = book2.Sheets;
    Excel.Worksheet sheet2 = sheets2[1] as Excel.Worksheet;
    Excel.Range cells2 = sheet2.Cells;
    Excel.Range destRange = cells2[5, 4] as Excel.Range;
    destRange.PasteSpecial(Excel.XlPasteType.xlPasteValues, 
      Excel.XlPasteSpecialOperation.xlPasteSpecialOperationNone, 
      Type.Missing, Type.Missing);
    Marshal.ReleaseComObject(destRange);
    Marshal.ReleaseComObject(srcRange);
    Marshal.ReleaseComObject(cells);
    Marshal.ReleaseComObject(cells2);
    Marshal.ReleaseComObject(sheet);
    Marshal.ReleaseComObject(sheet2);
    Marshal.ReleaseComObject(sheets);
    Marshal.ReleaseComObject(sheets2);
    book.Save();
    book2.SaveAs("D:\\test2.xlsx", Type.Missing, Type.Missing, 
      Type.Missing, Type.Missing, Type.Missing, 
      Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, 
      Type.Missing, Type.Missing, Type.Missing, 
      Type.Missing, Type.Missing);
    Marshal.ReleaseComObject(book);
    Marshal.ReleaseComObject(book2);
    books.Close();
    Marshal.ReleaseComObject(books);
    app.Quit();
    Marshal.ReleaseComObject(app);
  }
}