The Formatting sample is installed in the C1.Silverlight.RichTextBox\Formatting folder in the samples directory.
This sample shows how to use the C1RichTextBox control in the C1.Silverlight.RichTextBox.dll assembly and demonstrates the different formatting options of the C1RichTextBox control. Shows most formatting options available in C1RichTextBox and how they can be used in XAML markup.