C# intermediate test application

I need a simple C# example test application that uses MS Delta (see below) as a replacement of [login to view URL] (to copy files) but keeps versioned delta and allows reverting back to a previous version of a file - keep 3 versions. From an architecture perspective, should the versioned delta be stored in a central location/shared area? How will the design work with remote files (one local location copying to a remote location/FTP) [login to view URL] [login to view URL] This contains the Visual Studio project (C#) and test cases