C# UnauthorizedAccessException in File.Copy

我正在复习C#，所以我决定写一个程序，可以用来轻松导入我拍摄的照片。一点背景。。。我用JPEG和RAW拍摄照片，然后浏览和挑选JPEG，因为它们更小，更容易处理/预览。然后我只导入那些在后期制作中值得处理的RAW文件。

我想写一个简单的程序，从一个目录复制RAW文件，这些文件与我在另一个目录中筛选的JPEG文件相匹配。

这是代码：

static void Main(string[] args)
    {
        Console.WriteLine("Enter the JPEG Origin Directory: "); 
        string originDirectory = @"C:'Users'Greg'Pictures'Summer 2013'Back Bay'testJPEG";
        Console.WriteLine("Enter the RAW Origin Directory: ");
        string copyDirectory = @"C:'Users'Greg'Pictures'Summer 2013'Back Bay'testRAW";
        Console.WriteLine("Enter the RAW Import Directory: ");
        string rawCopyDirectory = @"C:'Users'Greg'Pictures'Summer 2013'Back Bay'testRAWImport"; 
        char[] delimiterChars = { '_', '.' };
        List<string> filesToCopy = new List<string>();
        List<string> CopiedFiles = new List<string>(); 
        foreach (var filePath in Directory.GetFiles(originDirectory))
        {
            Console.WriteLine("Filepath: '{0}'", filePath);
            string[] words = filePath.Split(delimiterChars);
            filesToCopy.Add(words[1]); 
        }
        filesToCopy.ForEach(Console.WriteLine);
        foreach (var copyFilePath in Directory.GetFiles(copyDirectory))
        {
          string[] delimited = copyFilePath.Split(delimiterChars);     
          if (filesToCopy.Contains(delimited[1]))
          {
              Console.WriteLine("Copied: '{0}'", copyFilePath);
              string fileName = Path.GetFileName(copyFilePath);
              string sourcePath = Path.GetDirectoryName(copyFilePath);
              string targetPath = rawCopyDirectory;
              string sourceFile = System.IO.Path.Combine(sourcePath, fileName);
              string destFile = System.IO.Path.Combine(targetPath, fileName);

             System.IO.File.Copy(sourcePath, destFile, true); 
          }

        }
        Console.WriteLine("Press any key to exit.");
        Console.ReadKey();
    }

当我将所有变量写入控制台时，一切似乎都如我所期望的那样工作，但我在Copy.File上遇到了一个异常，表明文件是只读的。我检查了一下，但它们不是，不管文件夹本身是什么，尽管我尽了最大努力，我还是无法将我的测试文件夹取消标记为只读。如果有任何帮助，我将不胜感激，我已经粘贴了下面的异常日志。

System.UnauthorizedAccessException was unhandled
  HResult=-2147024891
  Message=Access to the path 'C:'Users'Greg'Pictures'Summer 2013'Back Bay'testRAW' is denied.
  Source=mscorlib
  StackTrace:
       at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
       at System.IO.File.InternalCopy(String sourceFileName, String destFileName, Boolean overwrite, Boolean checkHost)
       at System.IO.File.Copy(String sourceFileName, String destFileName, Boolean overwrite)
       at ConsoleApplication1.Program.Main(String[] args) in C:'Users'Greg'documents'visual studio 2010'Projects'Photo Importer'Photo Importer'photoImporter.cs:line 56
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.Runtime.Hosting.ManifestRunner.Run(Boolean checkAptModel)
       at System.Runtime.Hosting.ManifestRunner.ExecuteAsAssembly()
       at System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext, String[] activationCustomData)
       at System.Runtime.Hosting.ApplicationActivator.CreateInstance(ActivationContext activationContext)
       at System.Activator.CreateInstance(ActivationContext activationContext)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssemblyDebugInZone()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

if(File.Exists(destFile))
{
    File.SetAttributes(destFile, FileAttributes.Normal);
}
File.Copy(sourcePath, destFile, true);