When using LinqToSql and unit testing in your application, you can benefit from two handy method calls that will make your life a lot easier.

var db = new DatabaseDataContext();
db.DeleteDatabase();
db.CreateDatabase();

You won’t need to worry about putting the database in a correct state before each of your test. I call them in my setup part of each unit tests that make use of the database.

If you need to insert some test data, so I used the ExecuteCommand method to execute a sql script.

db.ExecuteCommand(File.ReadAllText(@"..\..\..\..\db\referencedata.sql"));

var db = new DatabaseDataContext();
db.DeleteDatabase();
db.CreateDatabase();
db.ExecuteCommand(File.ReadAllText(@"..\..\..\..\db\referencedata.sql"));
db.Connection.Close();