C# 9–Module Initializer

Yesterday I blogged about an issue I had with Telerik. I needed to initialize some code before I could call the PDF conversion functionality:

	Telerik.Windows.Documents.Extensibility.JpegImageConverterBase jpegImageConverter = new Telerik.Documents.ImageUtils.JpegImageConverter();
	Telerik.Windows.Documents.Extensibility.FixedExtensibilityManager.JpegImageConverter = jpegImageConverter;

view raw JpegImageConverter.cs hosted with ❤ by GitHub

The question is where should I put this logic?

Perfect case to try out a new C# 9 feature: Module initializers.

Module initializers allow you to do eager, one-time initialization when a module is loaded, with minimal overhead and without the user needing to explicitly call anything.

Creating a module initializer is easy. Just add the ModuleInitializerAttribute on top of a method. Some requirements are imposed on the method targeted with this attribute:

1. The method must be static.
2. The method must be parameterless.
3. The method must return void.
4. The method must not be generic or be contained in a generic type.
5. The method must be accessible from the containing module.

	using System;
	using System.Runtime.CompilerServices;
	using System.Threading;
	using System.Threading.Tasks;
	namespace Example
	{
	class Initializer
	{
	[ModuleInitializer]
	public static void Init()
	{
	//Add your logic here
	}
	}
	}

view raw ModuleInitializer.cs hosted with ❤ by GitHub