Since the ODBC.NET data provider is accessing and using unmanaged resources and handles in the ODBC driver during operation, you should always call the Dispose method for any ODBCConnection, ODBCCommand, ODBCCommandBuilder, or ODBCDataAdapter objects when you are done using them (deterministic destruction). Failure to do so can cause major failures in the driver due to the resources and handles being freed up re-entrantly when the .NET garbage collector thread finalizes these objects.