In general, the linked GitHub repository contains the implementation of the service that is used in the Kendo UI official demos and I have linked it just for a reference. In case you would like to download it, you could do so by navigating to the root of the Project
and then clicking on the 'Clone or download' button. However, for learning purposes, I would suggest using the Sample Application that is distributed with the Telerik UI for ASP.NET MVC package.
If you have installed the Telerik UI for ASP.NET MVC package from the .msi executable that is available for download from your Telerik profile, then you should be able to run the Sample Application that is a copy of the demos site. Check out the following guide on how to start the application with Visual Studio:
With the above application running, you should be able to navigate to the TreeView Odata Binding Demo and inspect the code needed to configure it from the Sample Application solution.
Get quickly onboard and successful
with your Telerik and/or Kendo UI products with the Virtual Classroom free technical training, available to all active customers. Learn More.