Visual Studio is extensible by nature, ultimately consisting of a core "shell" that implements all commands, windows, editors, project types, languages, and other features through dynamically loadable modules called "packages".[19][20] Microsoft encourages and fosters third party partners to create modules for Visual Studio via the free VSIP program. However, according to Dan Fernandez, Microsoft "made a business decision to not allow 3rd party extensibility in Express"... (
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The program works with the following extensions:
ctl,
dob,
dsr,
frm,
pag,
vbg,
vbp,
vbz,
bas and
cls
