Question

I just installed visual studio 2010 but when i create a new project Framework 4 does not appear in the options for target framework. I know framework 4 installed correctly because the new app pools set to v4 were created in IIS. For some reason it’s just not showing up in visual studio. I tried repairing dotnet 4 and reinstalling visual studio but still no luck. Anyone else have this problem or know how to fix it?

Answer 1

Changes which lead to missing .Net4 problem:
1.
I changed some registry settings in
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
CommonFilesDir
CommonFilesDir (x86)
CommonW6432Dir
ProgramFilesDir
ProgramFilesDir (x86)
ProgramW6432Dir
All those were moved from C: drive to another drive (E: in my case)

2.
I changed the location of some user folders:
C:\Users\<name>\AppData\LocalLow
C:\Users\<name>\AppData\Roaming
Those were moved (via Properties->Path->”Move” button) from C: drive to F: drive.

After reverting 1. back to drive C:
and creating symbolic links in C:\Users\<name>\AppData to the new locations,
it worked again (note: I uninstalled VS before reverting the changes, and installed again afterwards)
(Create link with: mklink /d C:\Users\<name>\AppData\LocalLow E:\Data\LocalLow)

I can not say if both changes are really needed, because I changed both at once.
But finally it works again 😉

Greetings,
Frostregen