Question What is the code directly before a subroutine?

[Programgod]

I have a really dumb question, but this is one that was never covered in any of my .NET classes or books. I would like to know what the code before a subroutine is called and how it works.

<System.Xml.Serialization.XmlIgnoreAttribute()> _ <-- this code here, what is it called and how does it work?
Public ItemElementName As ItemChoiceType42

 

[JohnH]

Attributes in Visual Basic

 

[Programgod]

Your answer, while quite basic, was enough to answer my question. Thank you.