How to read and write data from json file from windows phone7 app

Question

Hi
I am developing wp7 app for the use of students my questions are
How can i write a code to read and write the json/text file for the wp7.
I am using windows 7 OS, VS 2010 Edition.
This is my code below:
xaml:
<Grid>
                    <TextBlock Height="45" HorizontalAlignment="Left" Margin="7,18,0,550" Name="textBlock1" Text="Full
Name: " />
                    <TextBox Width="350" Height="70" HorizontalAlignment="Left" Margin="108,1,0,0" Name="txtName"
Text="Enter your full name" VerticalAlignment="Top" />
                    <TextBlock Height="45" HorizontalAlignment="Left" Margin="6,75,0,0" Name="textBlock2" Text="Contact
No: " VerticalAlignment="Top" />
                    <TextBox Width="350" Height="70" HorizontalAlignment="Left" Margin="108,61,0,480" Name="txtContact"
Text="Enter your contact number" MaxLength="10" />
                    <Button Content="Register" Height="72" HorizontalAlignment="Left" Margin="10,330,0,0" Name="btnRegister"
VerticalAlignment="Top" Width="190" Click="btnRegister_Click" />
                </Grid>
xaml.cs:
private void btnRegister_Click(object sender, RoutedEventArgs e)
            string name, contact;
            name = txtName.Text;
            contact = txtContact.Text;
            try
                if (name != "" && contact != "")
                    string msg = name + " " + contact;
                    MessageBox.Show(msg);
                    Student stud = new Student
                        Name= name,
                        Contact = contact,
                    string jsonString = JsonConvert.SerializeObject(stud);
                    MessageBox.Show(jsonString);
                else
                    MessageBox.Show("Input Proper Information", MessageBoxButton.OK);
            catch (Exception ex)
                MessageBox.Show(ex.Message);
I have download NewtonSoft.json version 5.0.8.
So, I am able to convert input data into json format, but how can I able to write and read this data from a json/text file.
How can I do?
Thank you in adv and please, reply soon.

Answer 1

We don't have many samples left for Windows Phone 7 + Azure, the closest one to what you want to do is probably:
Using Local Storage with OData on Windows Phone To Reduce Network Bandwidth
this sample uses the local database feature: 'LINQ to SQL', available to Windows Phone 7.1 and 8.0 Silverlight applications, instead of simple file storage but even if you choose to stick with simple file storage I believe you should be able to adapt the
networking related portions of the sample to your particular application.
Eric Fleck, Windows Store and Windows Phone Developer Support. If you would like to provide feedback or suggestions for future improvements to the Windows Phone SDK please go to http://wpdev.uservoice.com/ where you can post your suggestions and/or cast
your votes for existing suggestions.