Visual Studio 2010: what is a .pfk file?

Question

I recently learned about the ability of Visual Studio to create a Setup.exe file for your project when publishing a project (Build → Publish [Project Name]). When I did this, I noticed that a new file with the name "[Project Name] _TemporaryKey.pfk" was added to my project (so if the project was HelloWorld, then .pfk would be "HelloWorld_TemporaryKey.pfk").

What is this file and why do I need it?

Is a PermanentKey needed at some point?

Thank you for your help.

Answer 1

A .pfk file is an Exchange personal information file that is used to "sign" your Visual Studio builds.

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- MSDN

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