[Home](../../) › [Metalama](../../metalama) › [Features](../features.md) › [Core Features](core.md) › Code Fix Toolkit

# Code Fix Toolkit

> Metalama's Code Fix Toolkit enhances productivity by automating code fixes, improving API discoverability, and reducing developer errors.

Canonical: https://postsharp.net/metalama/features/code-fixes.html

With Metalama, coding architects and senior developers can create custom code fixes and refactorings tailored to your business domain. These can be surfaced through warnings or the IDE’s lightbulb/screwdriver menu, improving team productivity at scale.

## Benefits

* **Accelerate development.** Developers can fix issues with a single click instead of manually figuring out how to resolve a warning or apply a pattern.

* **Improve API discoverability.** Make it easier for new developers to discover less common members of your API.

* **Reduce load on senior developers.** Frequent questions like “how do I fix this?” or “what’s the right pattern here?” are answered automatically with working, production-grade code.

* **Support junior developers.** Junior developers get guardrails and guidance without constant handholding, reducing errors and building confidence.

* **Reduce errors.** Automated fixes reduce the chance of human error when applying repetitive or complex changes.

## Features

* Attach a code fix to any warning or error reported by your aspects or fabrics.
* Suggest a code fix without reporting warnings or errors (also called code refactorings).
* Use the full code generation framework for code fixes.
* Look and feel like native code fixes.
* Work in any IDE.

## Example

Suppose we built a `[ToString]` aspect, which generates the `ToString()` method from all properties. We defined an attribute `[NotToString]` to exclude a property from the generated `ToString()` method. To improve the discoverability of the `[NotToString]` attribute and avoid endless "how do I fix this" questions, we add the following code to the aspect:

```cs
foreach ( var property in GetIncludedProperties( builder.Target ) )
{
    builder.Diagnostics.Suggest(
        CodeFixFactory.AddAttribute(
            property,
            typeof(NotToStringAttribute),
            "Exclude from [ToString]" ),
        property );
}
```

## Resources

* Reference documentation:
    - [Exposing an aspect as a live template](https://doc.metalama.net/conceptual/aspects/ide/live-template)
    - [Offering code fixes and refactorings](https://doc.metalama.net/conceptual/aspects/ide/code-fixes)

* Examples:
    - [ToString: adding code fixes and refactorings](https://doc.metalama.net/examples/tostring/tostring-2)

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