How to create extension methods for Types

Question

I am writing an extension method for parsing JSON string for any given type. I wanted to use the method on types instead of instances like many examples we already know, but

Answer 1

As stated in the accepted answer, you can't. However, provided that you have an extension method that can be called from an instance of T:

public static T ParseJson(this T t, string s)

You could write a utility method like this:

public static T ParseJson(string s)
    where T: new()
    => new(T).ParseJson(s);

And call it like this:

var t = Utilities.ParseJson(s);

I am afraid that's the best you can do...