问在C#和VB.NET中，使用SharpZipLib放气流具有不同的行为

EN

Public Function Deflate(ByVal text As String)
    Try
        Dim compressedData As Byte() = Convert.FromBase64String(text)

        System.Diagnostics.Debug.WriteLine(String.Concat("Compressed text data size: ", text.Length.ToString()))
        System.Diagnostics.Debug.WriteLine(String.Concat("Compressed byte data size: ", compressedData.Length.ToString()))

        Using compressedStream As MemoryStream = New MemoryStream(compressedData)
            Using decompressionStream As BZip2OutputStream = New BZip2OutputStream(compressedStream)
                Dim cleanData() As Byte

                Using decompressedStream As MemoryStream = New MemoryStream()
                    decompressionStream.CopyTo(decompressedStream) // HERE THE ERROR!

                    cleanData = decompressedStream.ToArray()
                End Using

                decompressionStream.Close()
                compressedStream.Close()

                Dim cleanText As String = Encoding.UTF8.GetString(cleanData, 0, cleanData.Length)

                System.Diagnostics.Debug.WriteLine(String.Concat("After decompression text data size: ", cleanText.Length.ToString()))
                System.Diagnostics.Debug.WriteLine(String.Concat("After decompression byte data size: ", cleanData.Length.ToString()))

                Return cleanText
            End Using
        End Using
    Catch
        Return String.Empty
    End Try
End Function

public static string Deflate(this string text)
{
        try
        {

            byte[] compressedData = Convert.FromBase64String(text);

            System.Diagnostics.Debug.WriteLine(String.Concat("Compressed text data size: ", text.Length.ToString()));
            System.Diagnostics.Debug.WriteLine(String.Concat("Compressed byte data size: ", compressedData.Length.ToString()));

            using (MemoryStream compressedStream = new MemoryStream(compressedData))
            using (BZip2InputStream decompressionStream = new BZip2InputStream(compressedStream))
            {
                byte[] cleanData;

                using (MemoryStream decompressedStream = new MemoryStream())
                {
                    decompressionStream.CopyTo(decompressedStream);

                    cleanData = decompressedStream.ToArray();
                }

                decompressionStream.Close();
                compressedStream.Close();

                string cleanText = Encoding.UTF8.GetString(cleanData, 0, cleanData.Length);

                System.Diagnostics.Debug.WriteLine(String.Concat("After decompression text data size: ", cleanText.Length.ToString()));
                System.Diagnostics.Debug.WriteLine(String.Concat("After decompression byte data size: ", cleanData.Length.ToString()));

                return cleanText;
            }

        }
        catch(Exception e)
        {
            return String.Empty;
        }
}