Microsoft Certified Solutions Developer (MCSD) Certification Practice Test

How is LINQ used with XML in C#?

1. By converting XML data directly into a DataTable.

2. By creating XML documents using the StringBuilder class.

3. By using the XDocument class to manipulate XML data.

4. By serializing XML to JSON format.

The correct answer is: By using the XDocument class to manipulate XML data.

Using LINQ with XML in C# involves the use of the XDocument class to facilitate navigating and querying XML documents in a straightforward and efficient manner. The XDocument class is part of the System.Xml.Linq namespace, which provides a rich set of features for working with XML data. When you utilize XDocument, you can load, create, and modify XML documents. LINQ queries can be directly applied to the XML elements and attributes, allowing you to filter, project, and transform XML data seamlessly. This declarative approach makes it easier to handle complex XML structures and simplifies operations like searching for elements, summarizing data, and transforming XML into other formats. The other options do not leverage LINQ's capabilities effectively. Converting XML to a DataTable does not involve the direct use of LINQ; creating XML documents with StringBuilder is a manual process and does not utilize LINQ's querying facilities; and while serializing XML to JSON is a different data handling technique, it doesn't specifically address the manipulation of XML data with LINQ. Hence, using the XDocument class is the most appropriate and effective method for working with XML in the context of LINQ in C#.