Telerik OpenAcces ORM provides a mechanism for customizing the way that CLR types are mapped to ADO types, but it is not possible to customize the values that are inserted automatically.
I would suggest mapping the boolean field to an int column with 1/0 inserted and that you perform a forward mapping scenario. This means that OpenAccess will create and update your tables from your classes. This way OpenAccess has the responsibility of managing your database and your code is in fact database agnostic. More on forward mapping can be found here.
Hope this helps.
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