consolidate the fonts between merges pdfs itextsharp C#

Question

I need to merge multiple pdfs together. I am using itextsharp to create all the pdfs. I need to reduce the size of the pdfs to the lowest possible size. I know the fonts are

Answer 1

You could rename subsets.

As if you had

Helvetica (subset)

and

Helvetica (subset)

you would create

Helvetica-1 (subset)

and

Helvetiva-2 (subset)

once they were different implementations (binary stream compare)