public bool IsSubsetOf(IEnumerable <T> other)
{
if (other == null)
{
throw new ArgumentNullException();
}
MultiSet <T> tmp = new MultiSet <T>(other);
int count = 0;
foreach (var element in other)
{
if (tmp.Contains(element))
{
continue;
}
if (Contains(element))
{
count++;
tmp.Add(element);
}
}
if (count == mset.Count)
{
return(true);
}
return(false);
}
