Using well-known instance types

Most applications contain a set of static relational data, such as a list of countries, states, credit card types, and others. The application does not need to waste time retrieving this static data from the database; it never changes. In this recipe, we will show you how you can use the well-known instance type from the unofficial NHibernate AddIns project to avoid this unnecessary work.

How to do it…

  1. Create a new class library project named WKITExample.
  2. Install the NHibernate package using the NuGet Package Manager Console by executing the following command:
    Install-Package NHibernate
    
  3. Add the following GenericWellKnownInstanceType class:
    [Serializable] public abstract class GenericWellKnownInstanceType<T, TId> IUserType ...

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