I am creating an AppInfo class that has a data access adapter declared in the members section like this private DataAccessAdapter _adapter = new DataAccessAdapter();

my question is should I hold onto this data access adapter during the life of the object or store a connection string and re-create/dispose of the dataadpter each time I reference an object of the class. Does it you alot of resources/ &/or permformance of the application.

Do it per action, so if you're saving a couple of entities in a routine, create an adapter instance and at the end of the routine, dispose it, similar to when you would use a transaction.

Creating a new DataAccessAdapter instance doesn't cost a lot of resources, almost nothing, it's very fast, so you shouldn't notice any delay at all.