public int Compare(TElement x, TElement y)
{
int num2;
if (!this.CanCompare)
{
throw new InvalidOperationException(NuGetResources.AggregateQueriesRequireOrder);
}
int num = 0;
using (Stack <Ordering <TElement, TElement> > .Enumerator enumerator = this._orderings.GetEnumerator())
{
while (true)
{
if (enumerator.MoveNext())
{
Ordering <TElement, TElement> current = enumerator.Current;
IComparable comparable = current.Extractor(x);
IComparable comparable2 = current.Extractor(y);
if ((comparable == null) && (comparable2 == null))
{
continue;
}
num = comparable.CompareTo(comparable2);
if (num == 0)
{
continue;
}
num2 = !current.Descending ? num : -num;
}
else
{
return(num);
}
break;
}
}
return(num2);
}