The .pdb files are available in the UI for Silverlight download page inside your Telerik account. Go to the next steps in order to download it:
• Log in at www.telerik.com
• Click the Products & Subscriptions
• Select DevCraft
• Click the blue Download button
• Locate UI for Silverlight and follow the Browse all product files
• Under the Other Setup Files
section, you should see the archive with name Telerik_UI_for_Silverlight_[version]_Dev_PDBs.zip containing the .pdb files.
Hope this helps.
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