Microsoft Certified Solutions Developer (MCSD) Certification Practice Test

What is the method to create an XML Document in C#?

1. Using the XmlDocument class to write XML data.

2. Using XElement to build an XML hierarchy.

3. Using StringBuilder to format XML output.

4. Using DataSet to convert XML files.

The correct answer is: Using XElement to build an XML hierarchy.

Using XElement to build an XML hierarchy is a powerful way to create an XML Document in C#. XElement is part of the LINQ to XML API, which provides a convenient and intuitive way to create and manipulate XML documents. One of the key advantages of using XElement is its simplicity and readability. With XElement, you can easily construct an XML structure by defining elements, attributes, and their relationships in a more declarative and object-oriented manner. This method allows developers to focus more on the logic of their application rather than the intricacies of XML syntax. Additionally, using XElement gives you access to LINQ queries to XML data, enabling you to query and filter XML content easily. This can be particularly useful when working with complex XML documents where manipulation and extraction of data are necessary. While other choices may involve working with XML data or structures, they do not provide the same level of straightforwardness and efficient manipulation that XElement offers for creating XML documents. Thus, for building XML hierarchies in an efficient and effective way, using XElement is the optimal approach.