/// <summary>
/// returns a copy of the given set as a <see cref="CharArraySet"/>. If the given set
/// is a <see cref="CharArraySet"/> the ignoreCase property will be preserved.
/// </summary>
/// <param name="set">A set to copy</param>
/// <returns>a copy of the given set as a <see cref="CharArraySet"/>. If the given set
/// is a <see cref="CharArraySet"/> the ignoreCase property will be preserved.</returns>
public static CharArraySet Copy <T>(ISet <T> set)
{
if (set == null)
{
throw new ArgumentNullException("set", "Given set is null!");
}
if (set == EMPTY_SET)
{
return(EMPTY_SET);
}
bool ignoreCase = set is CharArraySet && ((CharArraySet)set)._IgnoreCase;
var arrSet = new CharArraySet(set.Count, ignoreCase);
arrSet.AddItems(set);
return(arrSet);
}