SQLite : Windows Store Apps ติดต่อกลับ SQLite Database (C#)

using SQLite;

                var uri = new Uri("ms-appx:///data.db3"); //in application folder 
                var file = await StorageFile.GetFileFromApplicationUriAsync(uri); 
 
                var destinationFolder = ApplicationData.Current.LocalFolder;//local appdata dir 
 
 
                // var f = await destinationFolder.GetFileAsync("data.db3"); 
 
                await file.CopyAsync(destinationFolder); //copied application local  folder}} 

        public class person 
        { 
 
            [MaxLength(5), PrimaryKey] 
            
            public String name { get; set; } 
            [MaxLength(255)] 
            public String address { get; set; } 
            [MaxLength(11)] 
            public Double phone { get; set; } 
        } 

        private async void createtable(object sender, RoutedEventArgs e) 
        { 
            try 
            { 
                var dbpath = Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "data.db3"); 
                using (var db = new SQLite.SQLiteConnection(dbpath)) 
                { 
                    // Create the tables if they don't exist 
                    db.CreateTable<person>(); 
                    db.Commit(); 
 
                    db.Dispose(); 
                    db.Close(); 
                } 
                var line = new MessageDialog("Table Created"); 
                await line.ShowAsync(); 
            } 
            catch 
            { 
 
            } 
        } 

    var dbpath = Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "data.db3"); 
    using (var db = new SQLite.SQLiteConnection(dbpath)) 
    { 
	// Create the tables if they don't exist 
	db.Insert(new person() 
	{ 

	    name = txt1.Text.ToString(), 
	    address = txt2.Text.ToString(), 
	    phone = Convert.ToDouble(txt3.Text.ToString()), 
	} 
	); 


	db.Commit(); 
	db.Dispose(); 
	db.Close(); 
	var line = new MessageDialog("Records Inserted"); 
	await line.ShowAsync(); 
    } 

	var dbpath = Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "data.db3"); 
	using (var db = new SQLite.SQLiteConnection(dbpath)) 
	{ 
	    db.Delete<person>(list1.SelectedItem.ToString());//selected item 

	    var d = from x in db.Table<person>() select x; 
	    list1.Items.Clear(); 
	    foreach (var sd in d) 
	    { 
		list1.Items.Add(sd.name.ToString()); 
		//list1.Items.Add(sd.address.ToString()); 
		//list1.Items.Add(sd.phone.ToString()); 
	    } 
	    db.Dispose(); 
	    db.Close(); 
	} 

	var dbpath = Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "data.db3"); 
	using (var db = new SQLite.SQLiteConnection(dbpath)) 
	{ 
	    var d = from x in db.Table<person>() select x; 
	    list1.Items.Clear(); 
	    foreach (var sd in d) 
	    { 
		 
		list1.Items.Add(sd.name.ToString()); 
		//list1.Items.Add(sd.address.ToString()); 
		//list1.Items.Add(sd.phone.ToString()); 
	    } 
	    db.Dispose(); 
	    db.Close();