A nested type is a type argument that is also a generic type. Calling a method with such a nested type argument requires complicated and confusing code. It should be avoided as much as possible.
== Noncompliant Code Example
----
using System;
using System.Collections.Generic;
namespace MyLibrary
{
public class Foo
{
public void DoSomething(ICollection<ICollection<int>> outerCollect) // Noncompliant
