Microsoft does not officially release a "Portable" version of Office 2019. Most versions found online are created using third-party virtualization tools (like VMware ThinApp or Cameyo). Because these are not official releases, they may lack the stability of the standard installer and cannot receive automatic security updates.
If the portable version registered its COM classes (rare), you could try late-bound automation: Portable Microsoft Office 2019
using DocumentFormat.OpenXml.Packaging; using DocumentFormat.OpenXml.Spreadsheet; Microsoft does not officially release a "Portable" version
: When you close the program and unplug your USB, no traces or "junk" files are left on the host PC. there are some limitations:
However, there are some limitations:
