persistence is very easy in c#

C# persist

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace settings
{
    public partial class Form1 : Form
    {
        private string variable = "..."; 
        public Form1()
        {
            InitializeComponent();

            label1.Text = variable = Properties.Settings.Default["variable1"].ToString() ;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            variable = textBox1.Text;
            updateText();
            Properties.Settings.Default["variable1"] =  variable;
            Properties.Settings.Default.Save();
        }
        private void updateText()
        {
            label1.Text = variable;
        }
    }
}