title: SelectSingleNode() returns null
body: <p>Thanks for reading my thread. I am trying to load the value of FFTExe from following xml file, but it node returns null.</p>
  
  <p>Here is the code I use to read the xml</p>
  
  <pre><code>    const string CMD_FFT = "/Command/FFTExe";    
  
      string strFile = Application.Current.Resources["ApplicationSettingsFolder"].ToString() + "\\CommandList.xml";
      XmlDocument doc = new XmlDocument();
      doc.Load(strFile);
  
      XmlNode node = doc.SelectSingleNode(CMD_FFT);
      if (null != node)  //&lt;-----problem occurs here, node is null!!!
          GetAttribute(node, doc, "value", ref FFTExeFile);
  </code></pre>
  
  <p>Here is my xml file, where I want to extract "D:\fft\fft.exe" from entry FFTExe's value</p>
  
  <pre><code>&lt;?xml version="1.0" ?&gt;
  &lt;CommandList&gt;
      &lt;Command name="Capture" guid="30db4357-7508-46c9-84eb-3ca0900aa4c5" panel=".\Modules\ExperimentSettingsViewer.dll" description=""&gt;
          &lt;Experiment value="" /&gt;
          &lt;OutputPath value="" /&gt;
      &lt;/Command&gt;
      &lt;Command name="Run ImageJ Macro" guid="C1391459-132F-45ea-AE72-D7BEB2BD8086" panel=".\Modules\Panel.dll" description=""&gt;
          &lt;Macro value="" /&gt;
          &lt;DataFolder value="D:\out\" /&gt;
          &lt;FFTExe value="D:\fft\fft.exe" /&gt;
          &lt;Headless value="1" /&gt;
      &lt;/Command&gt;
  &lt;/CommandList&gt;
  </code></pre>
  
  <p>Thank you any suggestions.</p>
  
  <p>I also tried </p>
  
  <pre><code>const string CMD_FFT = "/Command/Command/FFTExe"; 
  </code></pre>
  
  <p>and</p>
  
  <pre><code>const string CMD_FFT = "FFTExe"; 
  </code></pre>
  
  <p>no luck</p>