I added signing example code in iTextdotNET-src-1.3.1-3.zip .
See
iText\Examples\JSharp\jp\ujihara\itext\sign\SignByDigitalID.java
file. You need to add a reference to BouncyCastle.Provider.dll.
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Can iTextDotnet apply signature and image to pre-existing signature fields?
I added signing example code in iTextdotNET-src-1.3.1-3.zip .
See
iText\Examples\JSharp\jp\ujihara\itext\sign\SignByDigitalID.java
file. You need to add a reference to BouncyCastle.Provider.dll.