We apologize for the confusion. The code in the topic you are working with is a small part of the whole project that is used in "Adding New Controls to Sitefinity" section. The fist topic in this section contains an overview and a zipped file with the whole project used throughout the section. All other topics in it demonstrate a separate functionality and include only the code that demonstrates how to implement that functionality. Still, in order to be able to run the code, you will need to download the whole project from Implementing Controls Overview
Let us know if you need further assistance.
All the best,
the Telerik team
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