If you are using WPF for developing a windows application as you mentioned in your last reply you should use the Telerik UI for WPF suite. The resources (demos and documentation) in the links that you are following are for Silverlight but they share most of their content with the WPF version. However, if you are using WPF I recommend you to check the WPF demos
and help documentation
If you are developing a web application that should be displayed in a web browser you can consider using Silverlight (and UI for Silverlight) over WPF, however, keep in mind that Microsoft plans to end the support for the Silverlight framework in few years. This is why you might think of another web technology to create you web application. For example ASP.NET AJAX
or ASP.NET MVC
About deploying a WPF application on the web you can take a look at the Create a New WPF Browser Application Project
MSDN post. Basically, rendering XBAP
applications will work out of the box in Internet Explorer but it might need additional plug-ins installed on other browser to run. Also, some browser might not support it at all. This is why I recommend you to consider another technology like HTML5 or ASP.NET for creating a web application.
I hope this information is helpful.
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