Developer Guide C# .NET End-to-End eSigner PDF Signing
Integrate eSigner PDF signing into your .NET 6+ application without your documents ever leaving your server. This C# guide walks through the full flow, from OAuth token and signHash to building the PKCS#7 signature with BouncyCastle and embedding it in the PDF. Follow along to sign your first PDF in the eSigner sandbox, then switch to production when you’re ready.
