我正在使用 Visual Studio 工具分析代碼，并收到以下消息：對(duì)象 'FileStream' 可以在方法 'BitmapFormat.WriteBitmap(byte[], int, int)' 中多次處理。為避免生成 System.ObjectDisposedException，您不應(yīng)在一個(gè)對(duì)象上多次調(diào)用 Dispose。我試圖在對(duì)象上顯式調(diào)用dispose，但無濟(jì)于事。這是方法：Stream FileStream = null;try{    FileStream = File.Open("finger.bmp", FileMode.Create, FileAccess.Write);    BinaryWriter TmpBinaryWriter = new BinaryWriter(FileStream);    TmpBinaryWriter.Write(StructToBytes(BmpHeader, 14));    TmpBinaryWriter.Write(StructToBytes(BmpInfoHeader, Marshal.SizeOf(BmpInfoHeader)));    //μ÷ê?°?D??￠    for (ColorIndex = 0; ColorIndex < m_nColorTableEntries; ColorIndex++)    {        ColorMask[ColorIndex].redmask = (byte)ColorIndex;        ColorMask[ColorIndex].greenmask = (byte)ColorIndex;        ColorMask[ColorIndex].bluemask = (byte)ColorIndex;        ColorMask[ColorIndex].rgbReserved = 0;        TmpBinaryWriter.Write(StructToBytes(ColorMask[ColorIndex], Marshal.SizeOf(ColorMask[ColorIndex])));    }    //í???Dy×a￡??a??????í???μ1á￠μ??êìa    RotatePic(buffer, nWidth, nHeight, ref ResBuf);    //D′í???    //TmpBinaryWriter.Write(ResBuf);    byte[] filter = null;    if (w - nWidth > 0)    {        filter = new byte[w - nWidth];    }    for (int i = 0; i < nHeight; i++)    {        TmpBinaryWriter.Write(ResBuf, i * nWidth, nWidth);        if (w - nWidth > 0)        {            TmpBinaryWriter.Write(ResBuf, 0, w - nWidth);        }    }    TmpBinaryWriter.Close();    FileStream.Close(); // <----- THE WARNING IS HERE}finally{    if (FileStream != null)        FileStream.Dispose();}如果我刪除try finally塊，也會(huì)發(fā)生同樣的情況。即使我使用using聲明。我怎樣才能避免它？