How to pass a dynamic class to

I have a question:

I have a method, who receives a string type as parameter (because its dynamic), how I have a method, this one:

internal static List<T> ToModel<T>(this DataTable dt)

var myClassAsString = "Sponsors";

well, the problem is how to initialize the method `ToModel`

Type ctype = Type.GetType("myClassAsString ");
                var internalType = Activator.CreateInstance(ctype).GetType();
                prop.SetValue(ToModel<internalType>(dataset.Tables[1]), null);

But, I get this error:

internalType is used as Type, but is a variable.

How I can assign the dynamic value to <T>