System.CodeDom.CodeCommentStatementCollection object, which is a collection of comments on the namespace.
C# Example
/* Creates namespace like thus when c# code is generated.
/* // Demo Namespace
/* namespace Mono.CodeDomDemo {
/*
/* }
...
CodeNamespace demoNs= new CodeNamespace("Mono.CodeDomDemo");
demoNs.Comments.Add(new CodeCommentStatement("Demo Namespace"));
...