Handling XML Attributes in XPath Queries - Unexpected Results in C#
I'm sure I'm missing something obvious here, but I'm currently working with XML data in a C# application and trying to extract certain elements based on their attributes using XPath. However, I'm running into unexpected results. I have the following XML structure: ```xml <books> <book id="1" genre="sci-fi"> <title>Foundation</title> </book> <book id="2" genre="fantasy"> <title>The Hobbit</title> </book> </books> ``` I want to select the `book` element with `id='1'` and retrieve its `title`. Here’s the code I’ve written: ```csharp using System; using System.Xml; using System.Xml.XPath; class Program { static void Main() { XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load("books.xml"); XPathNavigator navigator = xmlDoc.CreateNavigator(); // Attempting to select the book with id='1' var bookNode = navigator.SelectSingleNode("/books/book[@id='1']/title"); if (bookNode != null) { Console.WriteLine(bookNode.Value); } else { Console.WriteLine("No book found with id='1'."); } } } ``` When I run this code, I get the output: ``` No book found with id='1'. ``` I've verified the XML file is loaded correctly, and I can see the `books` element when I inspect the `xmlDoc`. However, the XPath expression seems to return null. I also tried using different quotes, just in case, but it didn’t help. Other than this, I've also tried different approaches like selecting the `book` node first and then checking its attributes, but that feels less efficient. Can anyone help me understand why the XPath query isn't returning the expected result? Is there something specific about handling attributes in XPath that I might be missing?