Simple app.config usage in C#. #cs #config

app.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>
  <appSettings>
    <add key="one" value="1"/>
    <add key="two" value="2"/>
    <add key="three" value="3"/>
    <add key="four" value="4"/>
  </appSettings>
</configuration>

read_from_appsettings.cs

namespace myapp
{
    // Make sure you add a reference to System.Configuration.dll.
    // http://msdn.microsoft.com/en-us/library/system.configuration.appsettingsreader.aspx
    using System;
    using System.Collections.Specialized;
    using System.Configuration;

    class Program
    {
        static void Main(string[] args)
        {
            AppSettingsReader reader = new AppSettingsReader();
            NameValueCollection appSettings = ConfigurationManager.AppSettings;
            Console.WriteLine(appSettings["two"]);
        }
    }
}