Aspose.pdf.kit concatenate

Hi Team,

I am using Aspose.pdf.kit concatenate method to merge pdf. but when I merge multiple pdf file size is getting doubled. upon research I found that font in pdf properties are getting shown double.
please let me know what is the issue in below code.

Dim myPdfFileEditor As New Aspose.Pdf.Kit.PdfFileEditor
myPdfFileEditor.Concatenate(TempPDFs, MergedPDFName)