I'm going to be writing a Windows application using the .NET framework and C#. The application will need to store relational data which will be queried, joined and processed.
Previously I've done this using SQL Server, but that is a total overkill for the application I am now making.
What's the simplest, easiest way to store relational data in my application? If I was on a Mac, I'd be using SQLite. What's the .NET equivalent?
If not sqlserver express, You may want to conisder Microsoft SQL Server Desktop Engine ( scaled down version of sqlserver) which is free in most cases. or MySQL which is also free. I'prefer mysql.
Why cant you use SQLite? It works on windows. SQLite Quick start.
Also see here for getting it to work with .NET http://web.archive.org/web/20100208133236/http://www.mikeduncan.com/sqlite-on-dotnet-in-3-mins/
So you could use SQLite if you wanted to but perhaps as others have pointed out SQL Express is a better option as you can upgrade to a full server if you need to in the future. Although from what you wrote i don't know if that's likely.
Sqlite is definitely the best option for embedded database for application storage. It is free fast and reliable.
SQLite
Firebird
MySQL Embedded
Sql Server Compact Edition (*.sdf files). Small enough for Smartphones but also available on the full platform. The .net 2 version was called Sql Server Mobile.
Here is a comparison between Compact and Express.