Can you provide some more information about your use case.
If you are going to just show the HTML code and don't edit it you can use regular TextBox with IsReadOnly set to true or TextBlock. If you need any advanced features such as export or printing, you can use RadRichTextBox with IsReadOnly="True", so that it cannot be edited.
the Telerik team
Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get it now >>