Open C# colorizing issues

[aeschli]

FYI I created the following bugs against https://github.com/atom/language-csharp from issues reported against the c# snytax highlighting in VS Code.
I will close the corresponding bugs in the VSCode repository that we kept open to track any progress.

atom/language-csharp#48
atom/language-csharp#46
atom/language-csharp#43
atom/language-csharp#44
atom/language-csharp#45

[ivanz]

@DustinCampbell FYI All but one of those are fixed and I have created a separate issue for it here #687 - so you can close this one. I have an idea how to fix the remaining one and will have a look when I get a chance.

[DustinCampbell]

@ivanz, do you think it'd make sense to port your fixes over to the (https://github.com/atom/language-csharp) repo?

[DustinCampbell]

cc @david-driscoll as well. I'm not sure if the OmniSharp extension for Atom uses the same grammar or not.

[david-driscoll]

Yeah, we use the built in csharp grammar from atom. The semantic highlighting is additive.