Db4oExtensions.cs

public static class Db4oExtensions
{
    public static void InTransaction(this IObjectContainer container, 
        Action<IObjectContainer> txClosure )
    {
        InTransaction(container, c =>
                                            {
                                                txClosure(c);
                                                return true;
                                            });
    }
    public static T InTransaction<T>(this IObjectContainer container,
        Func<IObjectContainer,T> txClosure)
    {
        try
        {
            return txClosure(container);
        }
        finally
        {
            container.Commit();
        }
    } 
}