How can I get a reference to a custom shader with C#?

[Capitalist Kerbal 18]

Hi!

How can I import/access a custom shader of mine with a plugin, so I can set create and set new materials at runtime?

I've tried creating asset bundles, but any tutorials I could find where quite convoluted or missing steps, and when I tried to load the shaders out of the asset bundles via these tutorials, they always ended up being null. Also, what I would typically use in unity, the LoadAssetBundle() function, seems to not exist in my class library.

Thanks, any advice would be appreciated!