Log files thread release

[Pinto, Antonio Joaquim]

IÂm using the latest version of log4net, with MS .NET Window Aplication, that is always running. I need one time every day to backup the log files from older days, but i canÂt do it, because all the files are being used by the aplication ( System.IO.IOException - The process cannot access the file because it is being used by another process. ) when trying to move the old files to a backup directory. How can i release the files that arenÂt already being used?   Thanks, Antonio Pinto.