PlantUML ERD to C# Entities

Turn your PlantUML ERD diagrams into clean, EF Core-ready C# entity classes — in one click.

What It Does

• Reads a PlantUML ERD diagram (.puml / .plantuml file)
• Generates one C# class per entity in the diagram
• Detects primary keys and foreign keys automatically
• Maps PlantUML column types to C# types (varchar → string, int → int, datetime → DateTime)
• Adds navigation properties for relationships
• Generates a shared BaseEntity.cs with audit fields
• Resolves the namespace from your .csproj automatically
• Never overwrites your work without asking (Skip / Overwrite / Rename / Cancel)

Quick Start

1. Open a PlantUML ERD file (.puml) in VS Code
2. Right-click the file (or press Ctrl+Shift+P → ERD: Generate C# Entities)
3. Done — entity files appear in an Entity/ folder next to your diagram

That's it. No configuration needed for the first run.

Type Mapping

How the Namespace Is Chosen

1. .csproj nearby — the extension walks up from your diagram's folder looking for a .csproj. Uses its <RootNamespace> (or project name) + .Entity. Example: MyCompany.Api → namespace MyCompany.Api.Entity;
2. No project found — falls back to the workspace folder name + .Entity
3. No workspace — MyProject.Entity

Requirements

• Visual Studio Code 1.85.0 or later

Release Notes

1.0.0

Initial release: PlantUML ERD parsing, C# entity generation, EF Core-ready navigation properties, base entity, and namespace resolution.

License

MIT