RadPropertyGrid offers a help bar which reads and displays the name and content of the property Description attribute. The help bar can be enabled by setting the HelpVisible property to true:
Enabling the Help Bar
radPropertyGrid1.HelpVisible = true;
RadPropertyGrid1.HelpVisible = True
By double clicking over the size grip above the help section, the help section is being collapsed or expanded. Additionally, by using the size grip, the end user can resize the help section.