/// <summary>
/// 从原始字节数组生成已压缩的字节数组。
/// </summary>
/// <param name="bytestocompress">原始字节数组。</param>
/// <returns>返回已压缩的字节数组</returns>
public static byte[] compress( byte[] bytestocompress )
{
memorystream ms = new memorystream();
stream s = outputstream( ms );
