Action delegate with more than four parameters (method arguments)

I have written a helper class which uses the Action - delegate as method parameter.
Like this:
public void SomeMethod(Action<T> methodToExecute, T argument);

According to the MSDN you can declare max. 4 arguments on an action delegate: Action<T1,T2,T3,T4>.

Now I'd like to call a method which needs 5! arguments. How could I do this?
The best solution would be something where I could use a dynamic number of method arguments.

Thanks