Making ConfigurationElementCollection strongly typed.

I was getting annoyed with ConfigurationElementCollection returning IEnumerable and not IEnumerable<T>, after some Googling I came across this post on StackOverflow http://stackoverflow.com/questions/7991252/read-web-config-section-to-list.

Basically you implement IEnumerable<T> and in GetEnumerator do this

   1:   public new IEnumerator<T> GetEnumerator()

   2:   {

   3:      return this.OfType<T>().GetEnumerator();

   4:   }

No more casting when you want to use Linq on the ConfigurationElementCollection