For some reason I am not able to run your project due to missing references, but I got the idea by looking at the code.
It is important to destroy all Kendo UI widgets in a container, which will be removed or its content will be replaced. Otherwise existing event handlers may cause unexpected side effects, and/or you can have memory leaks
The first method may be sufficient, but I recommend you to use the second one, which will destroy all Kendo UI widget instances found inside the specified container.
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