Reading a *.CSPROJ file in C#

I am attempting to write some code to read in a *.CSPROJ file using C#

The code I have is as follows

   XmlDocument xmldoc = new XmlDocument();
   xmldoc.Load(fullPathName);

   XmlNamespaceManager mgr = new XmlNamespaceManager(xmldoc.NameTable);
   //mgr.AddNamespace("x", "http://schemas.microsoft.com/developer/msbuild/2003");

   foreach (XmlNode item in xmldoc.SelectNodes("//EmbeddedResource") )
   {
      string test = item.InnerText.ToString();
   }

using the debugger I can see that 'fullPathName" has the correct value and the xmldoc once loaded has the correct contents.

The xmldoc does not have any "Nodes" though, as if the contents are not recognised as XML.

Using a XML editor the *.csproj file validates an XML document.

Where am I going wrong?

Why not use the MSBuild API?

Project project = new Project();
project.Load(fullPathName);
var embeddedResources =
    from grp in project.ItemGroups.Cast<BuildItemGroup>()
    from item in grp.Cast<BuildItem>()
    where item.Name == "EmbeddedResource"
    select item;

foreach(BuildItem item in embeddedResources)
{
    Console.WriteLine(item.Include); // prints the name of the resource file
}

You need to reference the Microsoft.Build.Engine assembly

You were getting close with your XmlNamespaceManager addition, but weren't using it in the SelectNodes method:

XmlNamespaceManager mgr = new XmlNamespaceManager(xmldoc.NameTable);
mgr.AddNamespace("x", "http://schemas.microsoft.com/developer/msbuild/2003");

foreach (XmlNode item in xmldoc.SelectNodes("//x:ProjectGuid", mgr))
{
    string test = item.InnerText.ToString();
}

(I switched to searching for a different element as my project didn't have any embedded resources)

For completeness here the XDocument version, this simplifies namespace management:

        XDocument xmldoc = XDocument.Load(fullPathName);
        XNamespace msbuild = "http://schemas.microsoft.com/developer/msbuild/2003";

        foreach (var resource in xmldoc.Descendants(msbuild + "EmbeddedResource"))
        {
            string includePath = resource.Attribute("Include").Value;
        }