try using IsolatedStorage for saving your user's notes inside phone's memory and try getting them back when your app is launched again. Here is a link that will help you get through IsolatedStorage MSDN Link Another Project
Example code from the second link:
Storing:
private void Button_Click_2(object sender, RoutedEventArgs e)
{
IsolatedStorageSettings isoStoreSettings = IsolatedStorageSettings.ApplicationSettings;
int integerValue;
int.TryParse(Entier.Text, out integerValue);
//store the integer
isoStoreSettings["IntegerValue"] = integerValue;
//store the string
isoStoreSettings["StringValue"] = chaine.Text;
}
Retrieving:
private void Button_Click_1(object sender, RoutedEventArgs e)
{
IsolatedStorageSettings isoStoreSettings = IsolatedStorageSettings.ApplicationSettings;
int integerValue;
string stringValue;
//Retreive The integer
if (isoStoreSettings.TryGetValue("IntegerValue", out integerValue))
{
Entier.Text = integerValue.ToString();
}
//Retreive the string
if (isoStoreSettings.TryGetValue("StringValue", out stringValue))
{
chaine.Text = stringValue;
}
isoStoreSettings.Save();
}