App without remote database

If I want to create .NET app that needs database functionalities, but I do not want to use remote database, what should I use instead?

For example, 1) web app which needs to store data 开发者_JS百科in some kind of database 2) desktop app which need to store data in some kind of database

You can use SQL CE or SQLite.

There's quite a big list of embedded databases for .NET on Wikipedia (http://en.wikipedia.org/wiki/Embedded_database). Personally I'd go for SQLite.

Use SQLite. Here is an ADO.Net provider with EF support: System.Data.SQLite