Nested generics <T1 <T2>>

Question

Why is it impossible to write something like this:

T1<T2> Method<T1, T2>(T1<T2> genericValue) { ... }

For example, I want to write an extension method that accepts a shared object containing shared code:

Container<CT<T>> ExtensionMethod<CT, T>(Container<CT<T>> value) { ... }

where CT can be an array, list, or any other type of collection, and T any type. But the compiler says: "T1 parameter type has no type parameters."

Is there any workaround for this?

Answer 1

It's impossible. Your general should compile for anyone T. Therefore, if you make any assumptions about T, besides what it is object, you need to add restrictions with where .

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