/// <summary>
/// <para/>Adds ForEach extension method.
/// <para/>Throws if <paramref name="action"/> invocation throws.
/// </summary>
/// <param name="source">Collection to loop through. If null - return null.</param>
/// <param name="action">Action that will be invoked for each element in <paramref name="source"/>. If null - returns <paramref name="source"/></param>
/// <returns>Returns <paramref name="source"/> unchanged</returns>
public static IEnumerable <T> ForEach <T>(this IEnumerable <T> source, Action <T> action)
{
return(source.ForEachA(action));
}