How to determine whether a version of. NET Framework is installed

Check whether the/% WINDIR %/system32/file contains the mscoree. dll file. If yes, the system has installed the mscoree. dll file.

Open the registry and start-run-Regedit

1.. NET Framework

. Net framework2.0
Key: [HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Net Framework Setup \ NDP \ v2.0.50727]
Value: Install = 1

. Net framework3.0
Key: [HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Net Framework Setup \ NDP \ V3.0]
Value: Install = 1

. Net framework3.5
Key: [HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Net Framework Setup \ NDP \ v3.5]
Value: Install = 1
Http://www.microsoft.com/ko-kr/download/details.aspx? Id = 22

2. Service Pack (taking 2.0 SP1 as an example)

Key: [HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Net Framework Setup \ NDP \ v2.0.50727]
Value: sp = 1

3. Language Pack (take Simplified Chinese as an example)

Key: [HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Net Framework Setup \ NDP \ v2.0.50727 \ 2052]
Value: Install = 1
For more languages, see: http://msdn.microsoft.com/en-us/library/aa480243.aspx