Towards xsd-based auto-completion: An html5 CompletionProvider for XML Literals

[VBAndCs]

I added a VbXmlCompletionProvider to this repo
You can add the two files to your Roslyn fork, in the folder Completion/CompletionProviders in the project Microsoft.CodeAnalysis.VisualBasic.Features
It will provide HTML5 auto completion in VB.NET XML Literals, but only inside the <vbxml></vbxml> tag.
I did this for two reasons:

1. not to mess with other xml literals that doesn't deal with html.
2. to support Vazor.

I will make a VSIX for this to allow install it as a VS extension (in progress now), but my aim from publishing this, is to allow contributors to build upon to provide a generic XML literals completion provider, based on the xsd that user supplies in the context as this missing feature was described in the docs

[VBAndCs]

And here is the VSIX installer to add this CompletionProvider to your VS as an extension:

Give it a tr, but notice it provide auto completion for HTML5 in VB.NET XML literals only inside vbxml tags:

Dim x = <vbxml>
   <!—auto completion for HTML 5 is available here -->
</vbxml>

Note: You can press Ctrl+space after <% to get this block written for you:

         <%= (Function()
                    Return < />
              End Function)()
         %>

where you can write vb conditions to form dynamic HTML parts as you want. You can also use loops but modify the lambda to be Iterator Function and Yield Html tags as you want.
Refer to Vazor ReadMe for more details.
Feedback is appreciated:
https://github.com/VBAndCs/Vazor/issues

[VBAndCs]

To do:

1. ZML auto completion.
2. Tag helpers auto completion.
3. Also I may reinvent tag helpers to be more suitable for VB.NET and XML literals. This will eliminate the need for Razor engine entirely which means I can drop the Virtual file provider, and process vbxml totally in VB.NET (Real Vazor). In fact this will be faster and more efficient then C# Razor , as there is no need Razor compiler to compile the page to a c# class then use it to generate HTML.

[VBAndCs]

I told the whole Vazor story here: https://github.com/VBAndCs/Vazor/blob/master/A-Vazor-story.md

[CyrusNajmabadi]

This doesn't seem to be an issue for the vblang repo. Closing out.