Encrypting/Decrypting web.config sections in ASP.Net

using System.Configuration;
using System.Web.Configuration;

public partial class _Default : System.Web.UI.Page
{

protected void Encripting_Click(object sender, EventArgs e)
{
EncriptSection("appSettings", "DataProtectionConfigurationProvider");
}
protected void Decripting_Click(object sender, EventArgs e)
{
DecriptSection("appSettings");
}

// section name may be connectionStrings, appSettings

private void EncriptSection(string sectionName, string provider)
{
Configuration config =WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath);
ConfigurationSection section =config.GetSection(sectionName);
if (section != null && !section.SectionInformation.IsProtected)
{
section.SectionInformation.ProtectSection(provider);
config.Save();
}
}

private void DecriptSection(string sectionName)
{
Configuration config =WebConfigurationManager.OpenWebConfiguration(Request.ApplicationPath);
ConfigurationSection section =config.GetSection(sectionName);
if (section != null && section.SectionInformation.IsProtected)
{
section.SectionInformation.UnprotectSection();
config.Save();
}
}
}

Code in Web.config
Before Encripting :
<appSettings>
<add key="SiteName" value="My Website" />
<add key="SecretKey" value="12345678" />
</appSettings>

After Encripting :
<appSettings configProtectionProvider="DataProtectionConfigurationProvider">
<EncryptedData>
<CipherData>
<CipherValue>AQAAANCMnd8BFdERjHoAwE/Cl+sBAAAAiH5JpzUAjkeIVeSHggMo3gQAAAACAAAAAAAD </CipherValue>
</CipherData>
</EncryptedData>
</appSettings>


You can access Key values asusually by writing

string sValue = ConfigurationSettings.AppSettings["SiteName"];

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