Encrypt connectionstrings section in Appconfig file C#

As we all know there are a lot of reasons why we should encrypt/protect our configuration file or the app.config file for windows(winforms). So if you are interested on how to do it. 
Read on.....




Here is my configuration file
App.config

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;
using System.Configuration;
using System.Data.OleDb;

namespace EncryptAppConfigFile
{
    public partial class frmConenctionString : Form
    {
        public frmConenctionString()
        {
            InitializeComponent();
        }

       
       /// 

       /// if the user clicks this button(protect button) let's try to encrypt our configuration file(app.config)
       /// 
        private void btnProctect_Click(object sender, EventArgs e)
        {
           
            //open the configuration file, 

            Configuration myConfig = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

            //after opening lets get the connection string section
            
            ConnectionStringsSection mySection = myConfig.ConnectionStrings;


            if (mySection != null)
            {
                // if the connectionstring is not protected we have to protect the section
                if (!mySection.SectionInformation.IsProtected)
                {
                   
                    mySection.SectionInformation.ProtectSection("RsaProtectedConfigurationProvider");
                    mySection.SectionInformation.ForceSave = true;
                }
            }

            myConfig.Save(ConfigurationSaveMode.Full);
        }

        private void btnGetSomething_Click(object sender, EventArgs e)
        {
            
            // someone ask me!
            // question: if the <connectionstring> section is encrypted can it still be used to open a database
            // ans: yes

            using (OleDbConnection con = new OleDbConnection(ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString))
            { 
                using(OleDbCommand cmd = new OleDbCommand ("SELECT TOP 1 Company FROM Customers",con))
                {
                    con.Open();

                    using (OleDbDataReader rdr = cmd.ExecuteReader())
                    {
                        if (rdr.HasRows)
                        {
                            rdr.Read();

                            MessageBox.Show(rdr[0].ToString());
                        }
                    }
                }
            }
        }
    }
}

Protected/Encrypted Appconfig.file

If someone wishes to click the button(Protect Connection String) -> see results below

 
  
   
   
    
     
     
      Rsa Key
     
     
      j7AJRpyn3yF2XwTwWkm7BAKvMBxPaLphuIYgrBKN0Cvct6gaU0/56btcWx9bpXMpJ8LteANXmetIUtPJ44zIQV/X2VY2vEbJPUZg8C+qhGYblOrPz05FO89W7onAeb5ZNjI0QpKtovG3jmVmf2kZvEW4RFxo5s2Vep1N1ykIXoU=
     
    
   
   
    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
   
  
 

sample output(connecting and fectching a record while app.config file/connectionstring is protected)!