The Browsable attribute is a desktop designer attribute and does not exist in
the Compact Framework.  You need to remove this from the code and add it to
you designer xml file.  You can have visual studios do this for you by right
clicking on the file in the solution explorer and selecting the View Class
Diagram link.  In the class on the designer,  Click on the property and in
the Properties page, select
the ... button in the Custom Attributes property.  Then just add
Browsable(false) to the list.  This will place the property in the xml file
and allow you to compile the control library.

I hope this helps.
Regards,
Rick D.
Contractor