cshtml code highlights various parts incorrectly

[federicodiluca]

Information

• Language: Razor / cshtml
• Plugins: none

Does the latest version of Prism from the download page also have this issue?
YES

Description
Various parts of .cshtml code are highlighted incorrectly (e.g. helper, cs attributes). Please check the below screenshots.

Code snippet
Here it is the test page to reproduce the issue.

The code being highlighted incorrectly.

<input type="text" placeholder="@Localize.GetLabelHtml("PLACEHOLDER")"/>

<h1>
    @Localize.GetLabelHtml("TITLE")
</h1>

@{
    var man = "Federico";
    var text = string.Concat("Nice to meet you", " ", man);
}

@helper TrialHelper(string name) {
    var text = string.Concat("Hello", " ", name);
    <h1>
        @(text + ", how's going?")
    </h1>
    <p>
        Hello World!
    </p>
}

Screenshots

How it is currently rendered:

How it is rendered in Visual Studio: