public static NSMutableSet <TKey> operator -(NSMutableSet <TKey> first, NSMutableSet <TKey> second)
{
if (first == null || first.Count == 0)
{
return(null);
}
if (second == null || second.Count == 0)
{
return(new NSMutableSet <TKey> (first));
}
var copy = new NSMutableSet <TKey> (first);
copy.MinusSet(second);
return(copy);
}
public static NSMutableSet operator +(NSMutableSet first, NSMutableSet second)
{
if (first == null || first.Count == 0)
{
return(new NSMutableSet(second));
}
if (second == null || second.Count == 0)
{
return(new NSMutableSet(first));
}
var copy = new NSMutableSet(first);
copy.UnionSet(second);
return(copy);
}
public NSSet(NSMutableSet <TKey> other)
: base(other)
{
}
