在C#中运用SharpZipLib和unrar进行解压缩

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using ICSharpCode.SharpZipLib.Zip;

namespace Campton.Tools
{
    public class ZipManager
    {
        构造函数#region 构造函数
        public ZipManager() { }
        #endregion

        私有静态变量#region 私有静态变量
        private static ZipManager _instance;
        #endregion

        静态方法#region 静态方法
        /**//// <summary>
        /// 创建实例方法
        /// </summary>
        /// <returns>返回ZipManager对象实例</returns>
        public static ZipManager Instance()
        {
            if (_instance == null)
                _instance = new ZipManager();

            return _instance;
        }
        #endregion

        公有方法#region 公有方法
        /**//// <summary>
        /// 解压文件
        /// </summary>
        /// <param name="zipFile">zip文件(完整的绝对路径)</param>
        /// <param name="destFolder">目标目录(绝对路径)</param>
        /// <returns>是否解压成功(true 为成功 false 为失败)</returns>
        public bool UnCompress(string zipFile, string destFolder)
        {
            if (!File.Exists(zipFile))
                return false;
            string exts = Path.GetExtension(zipFile);
            if (string.Compare(exts, ".zip", true) == 0)
            {
                return UnZip(zipFile, destFolder);
            }
            else if (string.Compare(exts, ".rar", true) == 0)
            {
                return UnRar(zipFile, destFolder);
            }
            else
            {
                return false;
            }
        }
        #endregion

        私有方法#region 私有方法
        /**//// <summary>
        /// 对Zip文件进行解压
        /// </summary>
        /// <param name="zipFile">zip文件(完整的绝对路径)</param>
        /// <param name="destFolder">目标目录(绝对路径)</param>
        /// <returns>是否解压成功(true 为成功 false 为失败)</returns>
        private bool UnZip(string zipFile, string destFolder)
        {
            if (!File.Exists(zipFile))
                return false;

            if (!Directory.Exists(destFolder))
                Directory.CreateDirectory(destFolder);
            FileInfo fi = new FileInfo(zipFile);

            try
            {
                using (ZipInputStream zis = new ZipInputStream(fi.OpenRead()))
                {
                    ZipEntry ze;
                    while ((ze = zis.GetNextEntry()) != null)
                    {
                        string path = Path.Combine(destFolder, ze.Name);
                        if (ze.IsDirectory)
                        {
                            Directory.CreateDirectory(path);
                        }
                        else
                        {
                            using (Stream outStream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.Write))
                            {
                                int size = 2048;
                                byte[] data = new byte[size];

                                while (size > 0)
                                {
                                    size = zis.Read(data, 0, data.Length);
                                    outStream.Write(data, 0, size);
                                }

                                outStream.Flush();
                            }
                        }
                    }
                }
            }
            catch (Exception)
            {
                return false;
            }

            return true;
        }

        /**//// <summary>
        /// 对RAR所支持的压缩文件进行解压
        /// </summary>
        /// <param name="zipFile">压缩文件(完整的绝对路径)</param>
        /// <param name="destFolder">目标目录(绝对路径)</param>
        /// <returns>是否解压成功(true 为成功 false 为失败)</returns>
        private bool UnRar(string zipFile, string destFolder)
        {
            if (!File.Exists(zipFile))
                return false;

            if (!Directory.Exists(destFolder))
                Directory.CreateDirectory(destFolder);
            
            Unrar unRar = new Unrar();

            try
            {
                unRar.DestinationPath = destFolder;
                unRar.Open(zipFile, Unrar.OpenMode.Extract);
                while (unRar.ReadHeader())
                {
                    unRar.Extract();
                }
                return true;
            }
            catch (Exception)
            {
                return false;
            }
            finally
            {
                if (unRar != null)
                {
                    unRar.Close();
                    unRar.Dispose();
                }
            }
        }
        #endregion
    }
}