Pdf redaction that doesn't involve Document Understanding

I am using Uipath.PDF to read pdf into text and i have a list of words that i want to redact from the original PDF, The activity that uipath Team supplies requires API and doc understanding, don’t have dollar and infra for that

Any one have like a invoke vb code that can help me like using pdfSharp SDK OR something like this : PdfRedactionMarkType Enumeration