How can we get List

I am using T4 Template to generate c# class. I need to generate shadow class from another class Class1. In the Calss1, I have TypeAttribute which can tell what is the type of Proeprty in the Class1. By using reflection I am getting the Type specified in the TypeAttribute.

I am not getting any standard way to get the Type for the Generics in unmangled format.

I need List<String> from System.Collections.Generic.List`1[System.String].

I am using T4Toolbox for T4Template.

Is T4Toolbox is providing any such feature to deal with generics while generating c# code?

Thank you.