reader.cs

var functionDocumentations = new List<FunctionDocumentation>();
var namespaceManager = new XmlNamespaceManager(new NameTable());
namespaceManager.AddNamespace("mml", "http://www.w3.org/1998/Math/MathML");

var parserContext = new XmlParserContext(null, namespaceManager, null, XmlSpace.None);
var schemas = new XmlSchemaSet(new NameTable());

var xmlSettings = new XmlReaderSettings
{
    DtdProcessing = DtdProcessing.Ignore,
    IgnoreComments = true,
    IgnoreWhitespace = true,
};

var documentationFiles = Directory.EnumerateFiles(path, "*.xml", SearchOption.AllDirectories);
foreach (var documentationFile in documentationFiles)
{
    using (var fs = File.OpenRead(documentationFile))
    {
        using (var xr = XmlReader.Create(fs, xmlSettings, parserContext))
        {
            var doc = XDocument.Load(xr);
            functionDocumentations.AddRange(ReadFunctionDocumentation(doc));
        }
    }
}

return new ProfileDocumentation(functionDocumentations);