System.IO.IOException: The process cannot access the file because it is being used by another process.

If you encounter this error that mean that you are trying to access a file which is not closed at the moment. The file your trying to access is still open, below is the screen-shot:

Solution:

The solution is that you simple need to close the file the TextIO class. For closing the file you neeed to use this syntax:

TextIo inputFile;
;

inputFile.finalize();

// This will close the file and then you can proceed with your remianing operation on the file.