确定机器上装有哪些.net framework版本

方法一， 检查文件系统

%systemroot%\Microsoft.NET\Framework

方法二，检查注册表 (http://stackoverflow.com/questions/199080/how-to-detect-what-net-framework-versions-and-service-packs-are-installed)

1.0                HKLM\Software\Microsoft\.NETFramework\Policy\v1.0\3705 1.1                HKLM\Software\Microsoft\NET Framework Setup\NDP\v1.1.4322\Install 2.0                HKLM\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727\Install 3.0                HKLM\Software\Microsoft\NET Framework Setup\NDP\v3.0\Setup\InstallSuccess 3.5                HKLM\Software\Microsoft\NET Framework Setup\NDP\v3.5\Install 4.0 Client Profile HKLM\Software\Microsoft\NET Framework Setup\NDP\v4\Client\Install4.0 Full Profile   HKLM\Software\Microsoft\NET Framework Setup\NDP\v4\Full\Install

通过 Wiz 发布