Not able to get data from Sqlite in Xamarin.Android

I am using this tutorial to show sqlite data in my app. Use a local Database in Xamarin but it did not work for me. help me with my errors in code. Error shown on Visual Studio is "an unhandled exception occur", and app fails to open on my phone. i am not using any emulator. thanks

using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

using System.Data;
using System.IO;
using SQLite;

namespace DicApp
{
public class Album
{
    [PrimaryKey, AutoIncrement]
    public int AlbumId { get; set; }
    public string Title { get; set; }
    public int ArtistId { get; set; }
}

[Activity(Label = "DicApp", MainLauncher = true, Icon = "@drawable/icon")]
public class MainActivity : Activity
{

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.Main);

        string dbName = "db.sqlite";
        string dbPath = Path.Combine(Android.OS.Environment.ExternalStorageDirectory.ToString(), dbName);
        // Check if your DB has already been extracted.
        if (!File.Exists(dbPath))
        {
            using (BinaryReader br = new BinaryReader(Assets.Open(dbName)))
            {
                using (BinaryWriter bw = new BinaryWriter(new FileStream(dbPath, FileMode.Create)))
                {
                    byte[] buffer = new byte[2048];
                    int len = 0;
                    while ((len = br.Read(buffer, 0, buffer.Length)) > 0)
                    {
                        bw.Write(buffer, 0, len);
                    }
                }
            }
        }

        using (var conn = new SQLite.SQLiteConnection(dbPath))
        {
            var cmd = new SQLite.SQLiteCommand (conn);
cmd.CommandText = "select * from Album";
var r = cmd.ExecuteQuery<Album> ();

Console.Write (r);
        }
    }

}
}