Would it be a good choice for use within a WCF service written in C#? I'm currently using FirebirdSql, but that's giving me way too many problems. Documentation and support is also horrible.
edit: Sorry, I should have been more specific when asking the question. What I meant was whether or not SQLite is a good choice for an embedded database within C#. MS SQL is out of the question for this one.
SQLite is a great platform for any language, however there are small concerns I've had with it under .NET.
All In all i really like SQLite, but if I could find one that didn't require a redistributable (*cough*SQL Express*cough*), I would use another embedded DBMS for .NET Apps. To date I havent found one aside from Raven DB but that's a document DB.
Edit: Note, Raven DB Is also only free for open-source applications. It's not suitable for proprietary applications unless you're willing to shell out for a licence, so when looking into it please be sure to factor it into your budget.