Poco2Proto

Convert simple C# POCO classes into .proto message definitions for gRPC, automatically.
This library is designed to be lightweight, simple, and dependency-free and ideal for quickly generating Protobuf message contracts from your existing models.

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✨ Features

• Converts public C# class properties into .proto message fields
• Supports string, numeric types, bool, byte[]
• Supports List<T> and arrays (repeated fields)
• Supports nullable types (int?, bool?, etc.)
• Converts property names to snake_case
• Maps DateTime to string (simple & practical)
• Zero external dependencies

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📦 Installation

NuGet Package Manager

Install-Package Poco2Proto

.NET CLI

dotnet add package Poco2Proto

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🚀 Usage Example

C# Class

public class UserProfile { public string FullName { get; set; } public int? Age { get; set; } public bool IsActive { get; set; } public List<string> Roles { get; set; } public string[] Tags { get; set; } }

Generate .proto

using Poco2Proto; string proto = Poco2Proto.GenerateProto<UserProfile>(); Console.WriteLine(proto); // Or save to file File.WriteAllText("UserProfile.proto", proto);

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✅ Example Output

syntax = "proto3"; package YourNamespace; message UserProfile { string full_name = 1; int32 age = 2; bool is_active = 3; repeated string roles = 4; repeated string tags = 5; }

You can now place this .proto file in your gRPC project and compile it with protoc.

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🔍 Notes & Limitations

This package is intentionally simple and works best when:

• Your classes are pure POCO DTOs
• No complex inheritance or polymorphism is needed
• You generate .proto definitions as a starting point and refine manually if needed

Future enhancements may include:

• Recursive nested message generation
• Enum support
• Custom type mappings

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🛠️ Contributing

Pull requests are welcome! If you'd like to extend the mapper behavior, open an issue or submit a PR.

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📄 License

Check the repository.