What's this? This is a demo to demonstrate how to use Razor class library to create reusable email template. How to run? Download Papercut.Setup.exe installer and install it. Run RazorHtmlEmails.AspNetCore Project. Related Link Walkthrough: Creating an HTML Email Template with Razor and Razor Class Libraries and Rendering it from a .NET Standard Class Library Litmus makes your email better Papercut Simple Desktop SMTP Server A cross-platform .NET library for IMAP, POP3, and SMTP.