/// <summary>
/// <para/>Invokes provided function on each element and returns list of results.
/// <para/>Throws if <paramref name="func"/> invocation throws.
/// </summary>
/// <param name="source">Collection to loop through. If null - return empty <see cref="List{K}"/>.</param>
/// <param name="func">Function that will be invoked for each element in <paramref name="source"/>. If null - returns empty <see cref="List{K}"/></param>
/// <returns>Returns <see cref="List{K}"/> of results of <paramref name="func"/> invocations on <paramref name="source"/></returns>
public static List <K> ForEach <T, K>(this IEnumerable <T> source, Func <T, K> func)
{
return(source.ForEachF(func));
}