Using Local Database for Application

using System.Data.Linq;

using System.Data.Linq.Mapping;

After that you need to define the model by hand.

//Model Class

[Table]

public class EmailClass

{

    [Column(IsDbGenerated = true, IsPrimaryKey = true)]

    public int Id { get; set; }

    [Column()]

    public string EmailAddress { get; set; }

}

Once the model is defined you then need the DataContext

public class EmailContext : DataContext

{

    public EmailContext(string sConnectionString)

        : base(sConnectionString)

    { }



    public Table<EmailClass> Emails

    {

        get

        {

            return this.GetTable<EmailClass>();

        }

    }

}

Connection string would look like,

string ConnectionString = "Data Source=isostore:/EmailDB.sdf";

Some reusable methods to Add and Display

public IList<EmailClass> GetEmails()

{

    List<EmailClass> emails = new List<EmailClass>();

    using (var db = new EmailContext(ConnectionString))

    {

        var query = from e in db.Emails

                    select e;

        emails = query.ToList();

    }



    return emails;

}



public void AddEmail(EmailClass _email)

{

    using (var db = new EmailContext(ConnectionString))

    {

        db.Emails.InsertOnSubmit(_email);

        db.SubmitChanges();

    }

}

Then comes UI which would help you to save and display data,
 

<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">

    <Grid.RowDefinitions>

        <RowDefinition Height="Auto"></RowDefinition>

        <RowDefinition Height="*"></RowDefinition>

    </Grid.RowDefinitions>

    <StackPanel Grid.Row="0" Orientation="Horizontal">

        <TextBox Width="300" x:Name="txtEmail"></TextBox>

        <Button HorizontalAlignment="Right" x:Name="btnSave" Content="Save" Width="120" Click="btnSave_Click"></Button>

    </StackPanel>

    <ListBox x:Name="lstEmails" Grid.Row="1" >

        <ListBox.ItemTemplate>

            <DataTemplate>

                <StackPanel>

                    <TextBlock Text="{Binding Path=EmailAddress}"></TextBlock>

                    <TextBlock Text="-----"></TextBlock>

                </StackPanel>

            </DataTemplate>

        </ListBox.ItemTemplate>

    </ListBox>            

</Grid>

The complete code is as below,

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;

using System.Windows.Shapes;

using Microsoft.Phone.Controls;

using System.Data.Linq;

using System.Data.Linq.Mapping;



namespace WP7_Samples

{    

    public partial class LocalDB_WP7 : PhoneApplicationPage

    {

        const string ConnectionString = "Data Source=isostore:/EmailDB.sdf";

        public LocalDB_WP7()

        {

            InitializeComponent();



            InputScope _scope = new InputScope();

            InputScopeName _scopeName = new InputScopeName();

            _scopeName.NameValue = InputScopeNameValue.EmailNameOrAddress;

            _scope.Names.Add(_scopeName);



            txtEmail.InputScope = _scope;



            using (var db = new EmailContext(ConnectionString))

            {

                if (!db.DatabaseExists())

                    db.CreateDatabase();



                LoadData();

            }

        }



        public void LoadData()

        {

            lstEmails.ItemsSource = GetEmails();

        }



        public IList<EmailClass> GetEmails()

        {

            List<EmailClass> emails = new List<EmailClass>();

            using (var db = new EmailContext(ConnectionString))

            {

                var query = from e in db.Emails

                            select e;

                emails = query.ToList();

            }



            return emails;

        }



        public void AddEmail(EmailClass _email)

        {

            using (var db = new EmailContext(ConnectionString))

            {

                db.Emails.InsertOnSubmit(_email);

                db.SubmitChanges();

            }

        }



        private void btnSave_Click(object sender, RoutedEventArgs e)

        {

            if (txtEmail.Text.Trim() != "")

            {

                var emailObj = new EmailClass() { EmailAddress = txtEmail.Text.Trim() };

                AddEmail(emailObj);

            }

            LoadData();

            txtEmail.Text = "";

        }

    }



    //Model Class

    [Table]

    public class EmailClass

    {

        [Column(IsDbGenerated = true, IsPrimaryKey = true)]

        public int Id { get; set; }

        [Column()]

        public string EmailAddress { get; set; }

    }



    public class EmailContext : DataContext

    {

        public EmailContext(string sConnectionString)

            : base(sConnectionString)

        { }



        public Table<EmailClass> Emails

        {

            get

            {

                return this.GetTable<EmailClass>();

            }

        }

    }

}