Module initializers in C#

user_35716 0
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Module initializers are a feature of the CLR that are not directly available in C# or VB.NET. They are global static methods named .cctor that are guaranteed to run before any other code (type initializers, static constructors) in an assembly are executed. I recently wanted to use this in a project and hacked together my own solution (console program/msbuild task) using Mono.Cecil, but I was wondering:

  1. Is there any way to trick the C# compiler into emitting module intializers? Any attributes (e.g. CompilerGenerated, SpecialName) or other trickery that could be used?

  2. Do the C# / VB.NET ever emit these initializers themselves for some purpose? From what I've seen they are used by managed C++ for some interop purposes, but I couldn't find any reference to them being used for other purposes. Any ideas?

clr-module-initializer clr c#
6 Answers

No, there is no way to emit them in C#, because C# puts everything in a class/struct and module initializers need to be global.

You will have to use a different tool to write them, preferably IL-Assembler.

As for the second question, I have to admit that I don't know, but I have never seen any generated by C#, and I use ILDasm quite often, so I assume that it doesn't emit them.

user_1730270
user_40481340

If you have static constructors or singleton classes which you can access true a static variable C# compiler will emit .cctor.

user_2265050
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