🚀 CoroutineTimeline.Net

Asynchronous power with a natural, sequential control flow — beginner-friendly, powerful for professionals.

CoroutineTimeline.Net is a lightweight, easy-to-use, and powerful coroutine timeline library for .NET. It lets you write asynchronous operations like a story — no complex state machines, no messy callbacks — just yield your delays and go.

Installation

Install the package via NuGet:

dotnet add package CoroutineTimeline.Net

Or find it on NuGet Gallery - CoroutineTimeline.Net

Interface Overview

public sealed class Coroutine : IDisposable { public static Coroutine StartCoroutine(Func<Coroutine, IEnumerator<object>> coroutine); public static Coroutine StartCoroutine(IEnumerator<object> coroutine); public void Cancel(); public void CancelAfter(int millisecondsDelay); public void CancelAfter(TimeSpan timeDelay); public void Wait(); public void Wait(CancellationToken token); public CancellationToken CancellationToken { get; } public CoroutineState State { get; } public bool AutoDispose { get; } public bool IsDisposed { get; } public bool IsRunning { get; } public event Action Ended; void IDisposable.Dispose(); }

• Uses Task.Run() and Task.Delay() with a CancellationTokenSource.

• Auto-disposes after completion or cancellation.

• Events:

  • Ended: Raised when the coroutine finishes, either normally or due to cancellation.

How to Use

using CoroutineTimeline; Coroutine co = Coroutine.StartCoroutine(MyCoroutine, Ended: () => { ... }); // Cancel the coroutine manually if needed co.Cancel(); // Or cancel after a delay (e.g., 5 seconds) co.CancelAfter(5000); static IEnumerator<object> MyCoroutine(Coroutine co) // Your coroutine method { // Logic here yield return 2.0f; // wait 2 seconds // Logic here yield return MyCoroutine2(co, "Deyaa", 22); } static IEnumerator<object> MyCoroutine2(Coroutine co, string name, int age) // Your coroutine method { // Logic here Task.Delay(1000, co.CancellationToken).Wait(); // Blocks until delay completes or cancelled Cosnole.WriteLine($"Hello {name}!"); yield return 2.0f; // wait 2 seconds if(age < 18) co.Cancel(); // Cancel the coroutine if age is less than 18 else if(age > 100) yield break; // End the coroutine if age is greater than 100) Console.WriteLine($"You are {age} years old."); }

🌟 Why It’s Powerful

• For Beginners — Minimal learning curve, easy-to-read code, simple async control.

• For Professionals — Fine-grained coroutine control, auto unlimited deep nesting of coroutines, CancellationToken integration, and multi-threaded orchestration.

• Cross-Platform — Developed targeting .NET Standard 2.0, so it supports a wide range of platforms including .NET Core, .NET Framework, Xamarin, and more.

🔹 Features

🐣 Beginner-Friendly

• Easy to use — Learn in minutes.
• Time-based delays — Just yield return a TimeSpan, int, or float (seconds).
• Sequential code, async execution — Write as if synchronous, runs asynchronously.
• Easy cancellation — Stop coroutines anytime with Cancel() or CancelAfter(x).
• Easy termination — End naturally with yield break.
• Auto-dispose — Clean up automatically when finished.

🛠 Professional-Grade

• Full coroutine object access — Trace state (IsRunning, State, Ended, etc...).

• Deep nesting — Start a coroutine inside another coroutine as deep as you want, stacked internally.

• Independent nested states — Each nested coroutine has its own state and can be:

  • Broken → pop stack, return to upper level or to parent.
  • Cancelled → terminate everything, even the parent coroutine.

• Thread-friendly — Use with Task and CancellationToken:

  Task.Delay(1000, coroutine.CancellationToken).Wait(); // Blocks parent coroutine until delay completes, or cancelled. Task.Delay(1000, coroutine.CancellationToken).ContinueWith((ant) => { ... }); // Works in parallel, can be cancelled.

• Recursive execution — If a coroutine yields another coroutine, it’s automatically run inside the same control flow.

📄 Examples

Beginner — Simple Timed Flow

Coroutine.StartCoroutine(MyTimer); static IEnumerator<object> MyTimer(Coroutine c) { for (int i = 5; i > 0; i--) { Console.WriteLine($"Countdown: {i}"); yield return 1; // wait 1 second } Console.WriteLine("Time's up!"); }

💡 What’s happening? You wrote sequential code, but it executes asynchronously with precise delays.

Pro — Game Loop with Nested Coroutines, State Control

Coroutine.StartCoroutine(PlayGame, () => {Console.WriteLinee("Ended")}); static IEnumerator<object> PlayGame(Coroutine co) { // game setup... while (true) { if (GameOver) { Task.Delay(500, co.CancellationToken).Wait(); yield return ShowOutro(co, scoreLeft, scoreRight); // Nested coroutine, inject inputs ConsoleWriteLine("Player won"); yield break; // clean exit } UpdateGame(); yield return 0.01f; // smooth frame rate } } static IEnumerator<object> ShowOutro(Coroutine co, int leftScore, int rightScore) { Console.Clear(); Console.WriteLine("GAME OVER"); yield return 0.1f; // wait a bit for the screen to clear if (rightScore > leftScore) yield break; // Exit only this coroutine, "Player won" printed in PlayGame if (rightScore < leftScore) co.Cancel(); // Cancel the entire coroutine stack, Nothing printed in PlayGame else yield return PlayerGame(co); // Nested coroutine, stacked internally }

💡 What’s happening?

• PlayGame is the main coroutine.
• ShowOutro is a nested coroutine (automatically stored on the stack, with its own state).
• Depending on the outcome, we break only the nested coroutine or cancel everything.

🎯 Strength Summary

• Beginners → Write async without the headaches.
• Pros → Gain full coroutine control, multi-threading integration, and deep nesting support.
• Everyone → Enjoy clean, readable, maintainable async code.

Contribute

Contributions are welcome! ❤️ See CONTRIBUTING.md, or open an issue/PR.

Conclusion

This coroutine package provides a lightweight and easy-to-use framework for managing asynchronous workflows based on C# iterator patterns. Designed for both beginners and professionals, it simplifies the creation of time-based delays and fine-grained coroutine control across multiple platforms. While still evolving, it aims to streamline async operations with minimal overhead and maximum flexibility. Your feedback and contributions are welcome to help shape its future development.

Disclaimer

This package is in active development and may undergo significant changes. Your feedback is valuable to help improve its stability and features. If you encounter any issues or have suggestions, please feel free to open an issue on the Issues page.