Mjml Email Templates

Handles MJML email template rendering in .NET using the Mjml.Net library. Sets up a template system with a shared layout for headers and footers, embeds MJML files as resources, and includes a renderer that does variable substitution before compiling to cross-client HTML. The composer pattern example is solid, keeping strongly-typed business logic separate from template rendering. The layout injection approach (replacing a {{Content}} placeholder) is simple and works well for transactional emails. If you're building signup confirmations, password resets, or billing emails and want something more maintainable than raw HTML strings, this gives you a clean foundation without much ceremony.