title: Visual studio Experimental support for decorators is a feature that is subject to change in a future release error
body: <p>I have common-helper.ts in my angular 6 app and i take "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning". <strong>Is my naming convention is wrong?</strong> Because when i remove "-" and change to file name to "commonhelper.ts" the error is fixing. And when i add tsconfig.json file "experimentalDecorators": true, error isn't fixing. </p>
  
  <pre><code>@Injectable({
    providedIn: 'root'
  })
  export class CommonHelper {
  
    constructor() { }
  
    }
  }
  </code></pre>
  
  <p>my tsconfig.json file</p>
  
  <pre><code>{
    "compileOnSave": false,
    "compilerOptions": {
      "baseUrl": "./",
      "outDir": "./dist/out-tsc",
      "sourceMap": true,
      "declaration": false,
      "moduleResolution": "node",
      //"emitDecoratorMetadata": true,
      "experimentalDecorators": true,
      "target": "es5",
      "typeRoots": [
        "node_modules/@types"
      ],
      "lib": [
        "es2017",
        "dom"
      ]
    }
  }
  </code></pre>