I have a xlsx file that I am using as a template to write to using EPPlus. This works fine but I want to make the application portable so I would like to make the xlsx part of the solution and not have it available for the user to be able to alter. What is the best way to make it part if the project so that I dont have to add it to the host computer? Also I may need to alter it later if the application changes so I would need to be able to exchange it for a newer version at times. Thank you.