public static NSOrderedSet operator +(NSOrderedSet first, NSOrderedSet second)
{
if (first == null)
{
return(second);
}
if (second == null)
{
return(first);
}
var copy = new NSMutableOrderedSet();
copy.UnionSet(second.AsSet());
return(copy);
}
public static NSOrderedSet operator -(NSOrderedSet first, NSSet second)
{
if (first == null)
{
return(null);
}
if (second == null)
{
return(first);
}
var copy = new NSMutableOrderedSet(first);
copy.MinusSet(second);
return(copy);
}
