/// <summary>An IEnumerable&lt;From&gt; extension method that safe convert all.</summary>
 ///
 /// <typeparam name="To">  Type of to.</typeparam>
 /// <typeparam name="From">Type of from.</typeparam>
 /// <param name="items">    The items to act on.</param>
 /// <param name="converter">The converter.</param>
 ///
 /// <returns>A List&lt;To&gt;</returns>
 public static List <To> SafeConvertAll <To, From>(this IEnumerable <From> items, Func <From, To> converter)
 {
     return(Proxy.SafeConvertAll(items, converter));
 }
 /// <summary>An IEnumerable&lt;T&gt; extension method that converts the items to a hash set.</summary>
 ///
 /// <typeparam name="T">Generic type parameter.</typeparam>
 /// <param name="items">The items to act on.</param>
 ///
 /// <returns>items as a HashSet&lt;T&gt;</returns>
 public static HashSet <T> ToHashSet <T>(this IEnumerable <T> items)
 {
     return(Proxy.ToHashSet(items));
 }