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
确定机器上装有哪些.net framework版本
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




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