Question

Well i downloaded a program for wheater but it is not mind now, i watched, than you write a city and you close the program, and when you open it again, it has de last city you write, how is it? i watched it has this code in whaterform_formClosed
but how do i create these variables? and if this is posible can I to do a program without a database? saveing all in a dataset? or datatables? default databales? default dataset?
but now i want to know how to create a Default variable

         private void weatherForm_FormClosed(object sender, FormClosedEventArgs e)
    {
        //Save Settings
        Settings.Default.defaultCity = txtCity.Text;
        Settings.Default.intervalText = comboBoxEdit1.Text;
        Settings.Default.windowPosition = this.Location;
        Settings.Default.timerOn = timer1.Enabled;
        Settings.Default.intervalTime = delay;
        Settings.Default.Save();
    }

Answer 1

You can use ‘settings’ to do this:

Starting with the .NET Framework 2.0,
you can create and access values that
are persisted between application
execution sessions. These values are
called settings. Settings can
represent user preferences, or
valuable information the application
needs to use. For example, you might
create a series of settings that store
user preferences for the color scheme
of an application. Or you might store
the connection string that specifies a
database that your application uses.
Settings allow you to both persist
information that is critical to the
application outside the code, and to
create profiles that store the
preferences of individual users.

See Using Application Settings and User Settings for more information.