......is the name of the namespace in the following method call.

Means that

StackOverflow.Controllers.CommentController.Details();

should have "StackOverflow.Controllers" as namespaces.

and

Apple.IPhone.Dialer.Dial(string phoneNumber);

should be "Apple.IPhone".. but it always runs into a bummer.

Things to keep in mind when identifying parts of method names are:

• The general rule for method names is: namespace.class.method()
• Only the namespace can contain periods (.)
• The last two periods separate the namespace from the class and the class from the method
• Any other periods are part of the namespace.

So the word closest to the parentheses is the method, the word to the left of it is the class, and everything left of that is the namespace. For example, if you had this:

System.IO.File.Copy(...);

The method is Copy, the class is File, and the namespace is System.IO.

The answer for Apple.IPhone.Dialer.Dial(string phoneNumber) is actually Dial