title: How update excel file that is locked by another user
body: <p>Does anyone know how to handle locked excel files with c#?
  I'm trying to create an application that updates an excel file that is on the network which will be probably being used by someone when someone else will try to modify it.</p>
  
  <p>So far I'm not able to write and save the file when is in use, and I'm pretty new to work with Excel and C#, so any help is welcome.</p>