Thanks for your posting and using Aspose.Cells for .NET.
For page count, I think, the similar function is Worksheet.GetPrintingPageBreaks(). If you let us know what the function does for you in the old code, then, we will be able to find the right function.
For conditional formatting, please see this article for your more help. You can use its code as per your needs.
bsheriff:Dim fcs As Aspose.Cells.FormatConditions = sheet.ConditionalFormattings(index)* I cannot figure out how to change this line of code to conform with the new version* Apparantly FormatConditions is no longer available