Clearing Exposed Properties for a Selected Class
To remove all exposed properties for a selected class from the C# exposure
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Right-click on the table row in the Classes table and then select the Clear Exposed Properties for Selected Class command from the popup menu that is displayed.
All exposed properties for that class are then removed from the C# exposure; that is, each property check box in the Features pane for that class is unchecked. (The class remains included in the C# exposure.)