I have an MVC 4 application of course it has mulitple configuration files and I am trying to encrypt its connection string using aspnet_regiis. My site is not hosted in IIS, yet I have IIS7 and VS 2012 on my machine.
I m trying this command in aspnet_regiis:
aspnet_regiis.exe -pef “connectionStrings” C:\Projects\DemoApplication
but it failed and show the message "Sections must only appear once per config file"
Please guide and help me.

Thanks
Web.Config
<?xml version="1.0" encoding="utf-8"?> <!-- For more information on how to configure your ASP.NET application, please visit http://go.microsoft.com/fwlink/?LinkId=169433 --> <configuration> <configSections> <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --> <section name="entityFramew ...

Go to the complete details ...