<PropertyRef Id="NETFRAMEWORK40FULL"/>
<PropertyRef Id="NETFRAMEWORK45"/>
<Condition Message='This setup requires Microsoft .NET Framework 4.0 Full package or greater needs to be installed for this installation to continue.'>
<![CDATA[Installed OR NETFRAMEWORK40FULL]]>
</Condition>
<Condition Message='This setup requires Microsoft .NET Framework 4.5 package or greater needs to be installed for this installation to continue.'>
<![CDATA[Installed OR NETFRAMEWORK45]]>
</Condition>
http://wixtoolset.org/documentation/manual/v3/customactions/wixnetfxextension.html
原文：
http://stackoverflow.com/questions/16302626/how-can-i-check-net-framework-4-5-prerequestics-in-wix
本文转自峻祁连. Moving to Cloud/Mobile博客园博客，原文链接：http://www.cnblogs.com/junqilian/p/3429500.html
，如需转载请自行联系原作者
