static void Main()
{
var set = new RankedSet <int> {
3, 5, 7
};
var arg = new int[] { 5, 7, 9 };
var ew = new RankedSet <int> (set);
var iw = new RankedSet <int> (set);
var se = new RankedSet <int> (set);
var uw = new RankedSet <int> (set);
ew.ExceptWith(arg);
iw.IntersectWith(arg);
se.SymmetricExceptWith(arg);
uw.UnionWith(arg);
Console.WriteLine($"{Text(set)} ExceptWith {Text(arg)} = {Text(ew)}");
Console.WriteLine($"{Text(set)} IntersectWith {Text(arg)} = {Text(iw)}");
Console.WriteLine($"{Text(set)} SymmetricExceptWith {Text(arg)} = {Text(se)}");
Console.WriteLine($"{Text(set)} UnionWith {Text(arg)} = {Text(uw)}");
}
