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Try changing the code in step 7 to:
Please note that you should use LoadPackageResource
method instead of LoadPackageFile
. Also, you will need to add the default project namespace to the beginning of the path. You will be able to find more information on the topic in the Loading Theme Package
section of the following help article: http://www.telerik.com/help/winforms/tools-visual-style-builder-working-with-visual-style-builder-saving-and-loading-theme-files.html
I hope this helps. Let me know if you encounter any other difficulties.
the Telerik team