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Expression Web 3 Installation Error: “Cannot Find DependencyProperty or PropertyInfo for Property named ‘Effect’”

Filed under: .Net,Expression Web,Microsoft — spiderwebwoman at 1:51 pm on Wednesday, January 6, 2010

During the installation of Expression Web 3, you may encounter the following error:

Exception has been thrown by the target of an invocation.Cannot find DependencyProperty or PropertyInfo for property named ‘Effect’. Property names are case sensitive. Error at object ‘LayoutRoot’ in markup file ‘XSetupUI;component/initializationwindow.xaml’.

Clicking the OK button takes you out of the installation and there you are – no Expression Web 3 installed on the machine and you feeling pretty frustrated. What does that error even mean anyway?

In a nutshell, that error means you have a bad install of the .NET Framework 3.5 SP1 on the machine, which is required for both the setup of Expression Web 3 and the program itself to run. To resolve it, follow the instructions at: Ruminations from the Expression Web support team : “Cannot Find DependencyProperty or PropertyInfo for Property named ‘Effect’” error during xWeb3 Setup

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