/// <summary>
/// Adds mapping for handlers of type <typeparamref name="THandler" /> decorated with <typeparamref name="TAttribute"/> to have behavior of type <typeparamref name="TBehaviorImplementation"/>.
/// </summary>
/// <typeparam name="TAttribute">Behavior attribute contract.</typeparam>
/// <typeparam name="THandler">Type of handler</typeparam>
/// <typeparam name="TBehaviorImplementation">Behavior contract implementor.</typeparam>
/// <param name="collection">Target behavior collection.</param>
/// <param name="index">Index to insert mapping at.</param>
/// <returns>Self (for fluency).</returns>
public static AttributeBehaviorCollection Add <TAttribute, THandler, TBehaviorImplementation>(this AttributeBehaviorCollection collection)
where TAttribute : Attribute
where TBehaviorImplementation : IBehavior <THandler>
{
Ensure.NotNull(collection, "collection");
return(collection.Add(typeof(TAttribute), typeof(TBehaviorImplementation)));
}