customSectionInAppConfigs

c10.cs

using System.Configuration;

namespace JungleApp.Batch.Infraestructure
{
    //Configuration of AppCountriesSection in the app.config
    class ConfigurationAppCountriesSection : ConfigurationSection
    {
        private const string _CountriesCollectionName = "Countries";

        [ConfigurationProperty(_CountriesCollectionName)]
        [ConfigurationCollection(typeof(CountriesCollection), AddItemName = "Country")] //Element name of Collection
        public CountriesCollection Countries {
            get
            {
                return (CountriesCollection)base[_CountriesCollectionName];
            }
        }

    }

    //This class teach to the framework to read the Countries Collection
    public class CountriesCollection : ConfigurationElementCollection
    {
        protected override ConfigurationElement CreateNewElement()
        {
            return new CountryConfigurationElement();
        }

        protected override object GetElementKey(ConfigurationElement element)
        {
            return ((CountryConfigurationElement)element).Name;
        }
    }

    //This class teach to the framework to read the Country element
    public class CountryConfigurationElement : ConfigurationElement
    {
        [ConfigurationProperty("name", IsRequired = true)]
        public string Name
        {
            get { return (string)this["name"]; }
            set { this["name"] = value; }
        }

        [ConfigurationProperty("continent", IsRequired = true)]
        public string Continent
        {
            get { return (string)this["continent"]; }
            set { this["continent"] = value; }
        }
    }
}

c11.cs

public List<Country> GetCountriesFromAppContriesSection()
{
    var countries = new List<Country>();
    var appCountriesSection = ConfigurationManager.GetSection("AppCountriesSection") as ConfigurationAppCountriesSection;

    foreach (CountryConfigurationElement countryElement in appCountriesSection.Countries )
        countries.Add(new Country(countryElement.Name, countryElement.Continent));

    return countries;
}

c12.cs

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <configSections>
    <section name="AppCountries" type="System.Configuration.NameValueSectionHandler" />
    <section name="AppCountriesSection" type="JungleApp.Batch.Infraestructure.ConfigurationAppCountriesSection, JungleApp.Batch" />
  </configSections>

  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>

  <AppCountriesSection>
    <Countries>
      <Country name = "Argentina" continent="America" />
      <Country name = "New Zealand" continent="Oceania" />
      <Country name = "Spain" continent="Europe" />
      <Country name = "China" continent="Asia" />
      <Country name = "South Africa" continent="Africa" />
    </Countries>
  </AppCountriesSection>

  <AppCountries>
    <add key="Argentina" value="America"/>
    <add key="New Zealand" value="Oceania"/>
    <add key="Spain" value="Europe"/>
    <add key="China" value="Asia"/>
    <add key="South Africa" value="Africa"/>
  </AppCountries>

  <appSettings>
    <add key="Argentina" value="America"/>
    <add key="New Zealand" value="Oceania"/>
    <add key="Spain" value="Europe"/>
    <add key="China" value="Asia"/>
    <add key="South Africa" value="Africa"/>
  </appSettings>

</configuration>

c2.cs

var argentinaValue = ConfigurationManager.AppSettings["Argentina"];

c3.cs

public List<Country> GetCountriesFromAppSettings()
{
    return new List<Country>()
    {
        new Country("Argentina", ConfigurationManager.AppSettings["Argentina"]),
        new Country("New Zealand", ConfigurationManager.AppSettings["New Zealand"]),
        new Country("Spain", ConfigurationManager.AppSettings["Spain"]),
        new Country("Africa", ConfigurationManager.AppSettings["Africa"]),
        new Country("South Africa", ConfigurationManager.AppSettings["South Africa"]),
    };
}

c4.cs

<configSections>
  <section name="AppCountries" type="System.Configuration.NameValueSectionHandler" />
</configSections>

c5.cs

<AppCountries>
  <add key="Argentina" value="America"/>
  <add key="New Zealand" value="Oceania"/>
  <add key="Spain" value="Europe"/>
  <add key="China" value="Asia"/>
  <add key="South Africa" value="Africa"/>
</AppCountries>

c6.cs

public List<Country> GetCountriesFromKeyValuePairCustomSection()
{
    var countries = new List<Country>();
    var appCountriesCollection = ConfigurationManager.GetSection("AppCountries") as NameValueCollection;

    foreach (var countryKey in appCountriesCollection.AllKeys)
        countries.Add(new Country(countryKey, appCountriesCollection[countryKey]));

    return countries;
}

c7.cs

<AppCountriesSection>
  <Countries>
    <Country name = "Argentina" continent="America" />
    <Country name = "New Zealand" continent="Oceania" />
    <Country name = "Spain" continent="Europe" />
    <Country name = "China" continent="Asia" />
    <Country name = "South Africa" continent="Africa" />
  </Countries>
</AppCountriesSection>

c8.cs

<configSections>
  <section name="AppCountriesSection" type="JungleApp.Batch.Infraestructure.ConfigurationAppCountriesSection, JungleApp.Batch" />
</configSections>

c9.cs

<AppCountriesSection>
  <Countries>
    <Country name = "Argentina" continent="America" />
    <Country name = "New Zealand" continent="Oceania" />
    <Country name = "Spain" continent="Europe" />
    <Country name = "China" continent="Asia" />
    <Country name = "South Africa" continent="Africa" />
  </Countries>
</AppCountriesSection>

cs1.cs

<appSettings>
  <add key="Argentina" value="America"/>
  <add key="New Zealand" value="Oceania"/>
  <add key="Spain" value="Europe"/>
  <add key="China" value="Asia"/>
  <add key="South Africa" value="Africa"/>
</appSettings>