Ironpdf — License Key !link!

Method 2: Via appsettings.json (Recommended for .NET Core / 5+)

An IronPDF license key is a unique cryptographic string provided by Iron Software. It unlocks the library, removing the default "Trial Version" watermarks from generated PDF documents and lifting runtime restrictions. ironpdf license key

using System; using System.IO; using IronPdf; using Microsoft.Extensions.Configuration; Method 2: Via appsettings