Visual Studio file nesting

.filenesting.json

{
  "help": "https://go.microsoft.com/fwlink/?linkid=866610",
  "root": true,
  "dependentFileProviders": {
    "add": {
      "extensionToExtension": {
        "add": {
          ".razor.css": [
            ".razor"
          ],
          ".js": [
            ".razor"
          ] 
        }
      },
      "fileSuffixToExtension": {
        "add": {
          "Model.cs": [
            ".razor"
          ]
        }
      }
    }
  }
}