How to add attributes to an element using LINQ, C#?

Question

I have an XElement object which has a number of attributes and I simply want to add another attribute to the element.

How do I do this?

Answer 1

xElement.Add(new XAttribute("Foo", "Bar"));

Answer 2

To create an element with an attribute use:
var xmlTest = new XElement("XmlElementName", new XAttribute("XmlAttributeName", "AttributeValue"));