FileInfo CopyTo method throwing an IOException (.net)

The CopyTo method of FileInfo class throws an IOException

The process cannot access the file 'C:\Data\Test.XML' because it is being used by another process.

Any ideas on why this should happen? I understand that copying a file just requires read access. So ideally even if the file is write protected or is opened by some other program the CopyTo should have no problem executing.

FileInfo copyFile = null;

//currentFile.FileInformation is of type FileInfo which is referring 开发者_JS百科to the file for which a copy is being created. In this case it is C:\Data\Test.XML
System.IO.FileInfo file = new FileInfo(currentFile.FileInformation.FullName);

// Constructing name for the temporary copy of Test.XML
string newName = "Temp Copy of " + currentFile.FileInformation.Name;

//This is where I get the exception. The CopyTo fails...
copyFile = file.CopyTo(System.IO.Path.Combine(currentFile.FileInformation.DirectoryName, newName), true);

fs = System.IO.File.Open(copyFile.FullName, FileMode.Open);

Also some important points to note :

• I have write access to the folder to which I am trying to copy. This is happening with only certain files.
• The file for which I am trying to create a copy of is not Read-only.

Please let me know if I can provide you with any more details

Thanks in advance

• Download sysinternal's process explorer
• put a breakpoint on File.CopyTo
• in process explorer, search for the file name, it will tell you which process got it open

Another process might have specified the FILE_SHARE_READ mode when it opened the file, which would prevent you from even reading it.

You can use Process Explorer to find that process.

If you're using Windows, try using Process Explorer to determine what process is using the files you are trying to copy.