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Configure IIS for Silverlight applications

Sitefinity CMS backend uses Silverlight RadControls. They require the following server extensions – .xaml, .xap, .xbap.

You must set the following MIME types in the server configuration:

Extension MIME Type 
.xaml application/xaml+xml
.xap
application/x-silverlight-app
.xbap application/x-ms-xbap

IMPORTANT: If you do not set the MIME types, error message are displayed to users browsing the backend.

For more information on how to set the MIME types, see Configuring IIS for Silverlight Applications.

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