As a customer you have access to our full source code including the templates for all of our controls. To download the source just go to Telerik.com, choose the product the you have from the Manage products
menu. Then click Download installer and other resources
. From the list of products choose Browse all product files
for RadControls for Windows Phone 8
and there you will find the source code.
I hope this information helps.
the Telerik team
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