Ch 29.

DaveTheCaver · February 4th, 2010, 02:28 AM

The code snippet:

Code:

  XDocument xdoc = XDocument.Load(@"C:\hamlet.xml"); 

  var query = from people in xdoc.Descendants("PERSONA") select people.Value;

  Console.WriteLine("{0} Players Found", query.Count());
  Console.WriteLine();

  foreach (var item in query)
  {
      Console.WriteLine(item);
  }

  Console.ReadLine();

fails to compile in Visual C# 2008 Express. The error:

Error 1 Could not find an implementation of the query pattern for source type 'System.Collections.Generic.IEnumerable<System.Xml .Linq.XElement>'. 'Select' not found. Are you missing a reference to 'System.Core.dll' or a using directive for 'System.Linq'? C:\Users\DaveTheCaver\Desktop\ProC#Book\ch29 CodeSample\Chapter 29\ConsoleApplication1\ConsoleApplication1\Program .cs 15 40 ConsoleApplication1

appears to be complaining about xdoc.Descendants("PERSONA"). The project has a reference to the System.Core.DLL and a using System.Linq directive.

Is there another reason for this error?

MohamedHassanAli · March 4th, 2011, 07:54 AM

Hi Dave !

Firstly try including this namespace System.Xml.Linq

Secondly check whether the XName in the Descendant method exist in your XML file.

Have u included in ur code ?
Using System.Core.Dll
Using System.Linq