public static class Constants
    {
        public const string DatabaseFilename = "OnSalesSQLite.db3";        

        public const SQLite.SQLiteOpenFlags Flags =
        SQLite.SQLiteOpenFlags.ReadWrite |
        SQLite.SQLiteOpenFlags.Create |
        SQLite.SQLiteOpenFlags.SharedCache;

        public static string DatabasePath
        {
            get
            {
                var basePath = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
                
                return Path.Combine(basePath, DatabaseFilename);
            }
        }
    }

Environment.SpecialFolder.Personal