Now back to the FileStorage.Portable project. Let's add another file into the Storage folder called SQLiteStorage.cs and implement the private variables:

public class SQLiteStorage : ISQLiteStorage 
    {
        #region Private Properties
        private readonly AsyncLock asyncLock = new AsyncLock();
        private readonly object lockObject = new object();
        private SQLiteConnectionWithLock _conn;
        private SQLiteAsyncConnection _dbAsyncConn;
        private readonly ISQLitePlatform _sqlitePlatform;
        private string _dbPath;
        private readonly ILogger _log;
        private readonly string _tag;
        #endregion
    }

We have a private AsyncLock object as we will be doing synchronous and asynchronous locking implementations. We then have two SQLite objects for creating the connection to our local database. The _dbPath variable is used to hold the local database path; this will be used for setting up the connection. We also have...