Ideal way to detect the version of .net Framework Installed

Reading the registry for appropriate values seems to be the ideal way to detect the version of .net framework installed in a PC. Following are the registry keys for each of the successful installation of .net framework.

Version: 3.0
Registry Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Settup\NDP\v3.0\Setup
Name: InstallSuccess (DWORD value = 1)

Version: 2.0
Registry Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v2.0.50727
Name: Install (DWORD value = 1)

Version: 1.1
Registry Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v1.1.4322
Name: Install (DWORD value = 1)

Version: 1.0
Registry Key: KEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\policy\v1.0
Name: 3705 (REG_SZ value = 3321-3705)

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Sanal K. Sankar
http://www.sanalks.com