The ListBoundDatatypes method returns a SQLObjectList object that enumerates the user-defined data types to which a rule, or default, is bound.
object.ListBoundDatatypes( ) as SQLObjectList
object
Expression that evaluates to an object in the Applies To list
HRESULT ListBoundDatatypes(
LPSQLDMOUSERDEFINEDDATATYPELIST* ppList);
A SQLObjectList object that contains 0 or more UserDefinedDatatype objects.
A SQL Server default or rule cannot be dropped when bound to a SQL Server object.
For the Default or Rule object, you can use the ListBoundDatatypes method to enumerate user-defined data type bound, then use the Name property of UserDefinedDatatype objects returned and the UnbindFromDatatype method of the object to remove bindings.
A SQL Server default or rule can be bound to a column. Use the ListBoundColumns and UnbindFromColumn method to remove bindings on a column.