PowerShell EPS Templates for C# and XAML

Syntax highlighting for EPS (Embedded PowerShell) templates that generate C# or XAML files.

Features

• Full C# or XML highlighting outside tags (using built-in VS Code grammars).
• EPS tags with PowerShell highlighting: <% %>, <%= %>, <%# %> (comment), <%% / %%> (escape), and the trim variants <%- / -%>.
• Tags work everywhere, including inside C# strings, C# comments, XML attribute values, and as element or attribute names (via L: injection).
• Unbalanced braces such as <% foreach ($x in $y) { -%> are no problem: { and } are treated as simple tokens, and the end of the tag is always recognized.
• Toggle comment (Ctrl+/) uses # inside a tag and // or <!-- --> outside it.

Limitations

• Only grammar-based highlighting is provided; there is no IntelliSense. C# Dev Kit, XAML language servers, and the PowerShell extension do not work with these files because they are not valid C#, XAML, or PowerShell.
• A subset of the PowerShell grammar is used inside tags (variables, strings, operators, keywords, cmdlets, and types). Script blocks and hashtables are not recognized as nested regions.
• Block comments <# #> inside tags are not highlighted.

Conflicts with Other Extensions

If another extension (e.g. for XAML or PostScript .eps) claims the files, enforce the association in your settings:

"files.associations": {
  "*.cs.eps": "cs-eps",
  "*.xaml.eps": "xaml-eps"
}

Development

• Press F5 in VS Code to start an Extension Development Host with the samples/ folder.
• Inspect tokens with Developer: Inspect Editor Tokens and Scopes.
• Package the extension (requires Node.js): npx @vscode/vsce package