C# 多个文件生成zip

/// <summary>
/// 多文件处理 压缩
/// </summary>
/// <param name="files">多个文件的物理路径（带后缀）</param>
/// <param name="ZipedFileName">压缩后的文件物理路径（带后缀）</param>
/// <param name="Password">压缩包密码</param>
/// <returns></returns>
public static bool ListZip(string[] files, string ZipedFileName, string Password = "")
{
    var ret = false;
    ZipOutputStream zipStream = null;
    try
    {
        files = files.Where(f => File.Exists(f)).ToArray();
        if (files.Length != 0)
        {
            zipStream = new ZipOutputStream(File.Create(ZipedFileName));
            zipStream.SetLevel(6);
            if (!string.IsNullOrEmpty(Password.Trim())) zipStream.Password = Password.Trim();
            ZipFileDictory(files, zipStream, ZipedFileName);
            ret = true;
        }
    }
    finally
    {
        if (zipStream != null)
        {
            zipStream.Finish();
            zipStream.Close();
        }
    }
    return ret;
}


private static void ZipFileDictory(string[] files, ZipOutputStream s, string zipedFile)
{
    ZipEntry entry = null;
    FileStream fs = null;
    Crc32 crc = new Crc32();
    try
    {
        foreach (string file in files)
        {
            //打开压缩文件  
            fs = File.OpenRead(file);
            byte[] buffer = new byte[fs.Length];
            fs.Read(buffer, 0, buffer.Length);
            var name = Path.Combine("", Path.GetFileName(zipedFile.Replace(".zip", "")), Path.GetFileName(file));
            entry = new ZipEntry(name);
            //因为帮助类里面少了这句代码,设置字符集,解决乱码
            entry.IsUnicodeText = true;
            entry.DateTime = DateTime.Now;
            entry.Size = fs.Length;
            fs.Close();
            crc.Reset();
            crc.Update(buffer);
            entry.Crc = crc.Value;
            s.PutNextEntry(entry);
            s.Write(buffer, 0, buffer.Length);
            s.Flush();
        }
    }
    finally
    {
        if (fs != null)
        {
            fs.Close();
            fs.Dispose();
        }
        if (entry != null)
            entry = null;
        GC.Collect();
    }
}