You are creating an application that uses a relational database. Your application supports several database types. Upon installation of your application, an administrator will select the specific database to use. You must choose a data access strategy to support multiple databases. Your solution should use the data provider that offers the best performance.

What should you do?

Using DbProviderFactory lets you write provider-independent code and choose the provider at run time. When you create a DbProviderFactory instance, passing it information about the provider along with the connection string, the instance can determine the correct strongly typed object to return, based on the information it has been given. This lets you write code that does not depend on the data provider.