Finally I solved this way:
private class PriorityQueueEntry<TPriorityValue,IIdentifiableEntry,IType> :
IComparer<PriorityQueueEntry<TPriorityValue,IIdentifiableEntry,IType>>
where TPriorityValue : IComparable
where IIdentifiableEntry : Identifier<IType>
where IType : IConvertible
{
public TPriorityValue Priority{get;private set;}
public IIdentifiableEntry Entry{get;private set;}
public PriorityQueueEntry(TPriorityValue val,IIdentifiableEntry entry)
{
Priority = val;
Entry = entry;
}
public int Compare(PriorityQueueEntry<TPriorityValue,IIdentifiableEntry,IType> first, PriorityQueueEntry<TPriorityValue,IIdentifiableEntry,IType> second)
{
if (first.Priority.CompareTo(second.Priority) < 0)
{
return -1;
}
else if (first.Priority.CompareTo(second.Priority) > 0)
{
return 1;
}
return first.Entry.Id.ToUInt32(NumberFormatInfo.CurrentInfo) < first.Entry.Id.ToUInt32(NumberFormatInfo.CurrentInfo) ? -1:1;
}
}