Web Forms :: What Is .xap Extension

Jan 20, 2010

I've looked at a few files this AM, all have .xap, and all are throwing errors as I try to debug each of these projects. Here is an excellent example:

http://www.codeproject.com/KB/silverlight/TallColumns.aspx

I'd like to learn how this project works, but each time I try to debug, it throws an error saying 'Error creating control xaml1, unknown server tag asp.SilverLight'. what does this mean? What do I need to do to make this work?

I'm using VWD 2008 Express.

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