<?xml version="1.0"?> <clause number="24.4.1" title="The AttributeUsage attribute"> <paragraph>The attribute AttributeUsage is used to describe the manner in which the attribute class can be used. </paragraph> <paragraph>A class that is decorated with the AttributeUsage attribute must derive from System.Attribute, either directly or indirectly. Otherwise, a compile-time error occurs. </paragraph> <paragraph> <note>[Note: For an example of using this attribute, see <hyperlink>24.1.1</hyperlink>. end note]</note> </paragraph> </clause>