c#两种复制文件的方法；

1. 
   public void CopyFile(string sourcepath)
   {
   try
   {
   string temp = sourcepath.Substring(SourcePath.Length);
   string targepath = TargetPath + temp;
   FileInfo fi = new FileInfo(targepath);
   if (!fi.Directory.Exists)
   {
   fi.Directory.Create();
   }
   FileStream source = new FileStream(sourcepath, FileMode.Open, FileAccess.Read);
   FileStream target = new FileStream(targepath, FileMode.OpenOrCreate, FileAccess.Write);
   byte[] b = new byte[2048];
   int len = 0;
   while ((len = source.Read(b, 0, b.Length)) > 0)
   {
   target.Write(b, 0, len);
   target.Flush();
   }
   source.Close();
   target.Close();
   }
   catch
   {
   }
   }
   2。
   public void CopyFile(string sourcepath)
   {
   try
   {
   string temp = sourcepath.Substring(SourcePath.Length);
   string targepath = TargetPath + temp;
   FileInfo fi = new FileInfo(targepath);
   if (!fi.Directory.Exists)
   {
   fi.Directory.Create();
   }
   FileInfo sourcefi = new FileInfo(sourcepath);
   sourcefi.CopyTo(targepath);
   }
   catch
   {
   }
   }
   

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