Chapter 10. LINQ to XML
The .NET Framework provides a number of APIs for working with XML data. From Framework 3.5, the primary choice for general-purpose XML document processing is LINQ to XML. LINQ to XML comprises a lightweight LINQ-friendly XML document object model, plus a set of supplementary query operators. LINQ to XML is supported fully in the Metro profile.
In this chapter, we concentrate entirely on LINQ to XML. In Chapter 11, we cover the more specialized XML types
and APIs, including the forward-only reader/writer, the types for working
with schemas, stylesheets and XPaths, and the legacy
The LINQ to XML DOM is extremely well designed and highly
performant. Even without LINQ, the LINQ to XML DOM is valuable as a
lightweight façade over the low-level
All LINQ to XML types are defined in the
This section starts with a very brief introduction to the concept of a DOM, and then explains the rationale behind LINQ to XML’s DOM.
What Is a DOM?
Consider the following XML file:
<?xml version="1.0" encoding="utf-8" standalone="yes"?> <customer id="123" status="archived"> <firstname>Joe</firstname> <lastname>Bloggs</lastname> </customer>
As with all XML files, we start with a
declaration, and then a root
element, whose name is
customer element has two
attributes, each with a name (
status) and value (
customer, there are two child ...