Visual Basic 2008 Recipes: A Problem-Solution Approach

3.5. Create a Type That Cannot Cross Application Domain Boundaries

Problem

You need to create a type so that instances of the type are inaccessible to code in other application domains.

Solution

Ensure the type is nonremotable by making sure it is not serializable (no Serializable attribute) and it does not derive from the MarshalByRefObject class.

How It Works

On occasion, you will want to ensure that instances of a type cannot transcend application domain boundaries. To create a nonremotable type, ensure that it isn't serializable and that it doesn't derive (directly or indirectly) from the MarshalByRefObject class. If you take these steps, you ensure that an object's state can never be accessed from outside the application domain in which ...