Web Api Help Page XML comments from more than 1 files

Question

I have different plugins in my Web api project with their own XML docs, and have one centralized Help page, but the problem is that Web Api\'s default Help Page only support

Answer 1

Kirans solution works very well. I ended up using his approach but by creating a copy of XmlDocumentationProvider, called MultiXmlDocumentationProvider, with an altered constructor:

public MultiXmlDocumentationProvider(string xmlDocFilesPath)
{
       XDocument finalDoc = null;
        foreach (string file in Directory.GetFiles(xmlDocFilesPath, "*.xml"))
        {
            using (var fileStream = File.OpenRead(file))
            {
                if (finalDoc == null)
                {
                    finalDoc = XDocument.Load(fileStream);
                }
                else
                {
                    XDocument xdocAdditional = XDocument.Load(fileStream);

                    finalDoc.Root.XPathSelectElement("/doc/members")
                        .Add(xdocAdditional.Root.XPathSelectElement("/doc/members").Elements());
                }
            }
        }

        // Supply the navigator that rest of the XmlDocumentationProvider code looks for
        _documentNavigator = finalDoc.CreateNavigator();
}

I register the new provider from HelpPageConfig.cs:

config.SetDocumentationProvider(new MultiXmlDocumentationProvider(HttpContext.Current.Server.MapPath("~/App_Data/")));

Creating a new class and leaving the original one unchanged may be more convenient when upgrading etc...