EntityFramework - Log to File

using (var db = new ContosoUniversityEntities())  
{
    db.Database.Log = (log) =>
    {
        System.IO.File.AppendAllText(@"Z:\log.txt", "\r\n");
        System.IO.File.AppendAllText(@"Z:\log.txt", log);
    };

    var c = db.Course.Find(1);
    var name = c.Department.Name;
}