public static MultiSet <T> operator +(MultiSet <T> first, MultiSet <T> second)
{
if (first == null || second == null)
{
throw new ArgumentNullException();
}
MultiSet <T> result = new MultiSet <T>();
foreach (var item in first)
{
result.Add(item);
}
foreach (var item in second)
{
result.Add(item);
}
return(result);
}
public MultiSetEnumerator(MultiSet <T> ts)
{
this.currentObj = ts;
}