在Visual Studio中未安装依赖项

我当前正在将ASP.Net RC1升级到ASP.Net Core RC2。Visual Studio中的解决方案资源管理器给我一个带有子文件夹“ npm-not installed”的“ Dependencies-not installed”警告。

但是，依赖项似乎确实已安装-我在项目目录中运行了“ npm install”，并且运行良好，没有任何错误，只是一些警告。它将依赖项文件夹添加到称为节点模块的父文件夹中，我可以在Windows资源管理器中清楚地看到它。node-modules文件夹包含用于angular2，bootstrap，copy-webpack-plugin等的文件夹。

有谁知道为什么Visual Studio告诉我它们没有安装？我还尝试从程序包管理器控制台运行npm install并在这些文件夹上执行“右键单击->恢复程序包”，从而在解决方案资源管理器中给我警告。

这是我的package.json文件：

{
  "name": "EmptyWebApp",
  "version": "0.0.0",
  "dependencies": {
    "angular2": "2.0.0-beta.13",
    "bootstrap": "^3.3.5",
    "es6-promise": "^3.0.2",
    "es6-shim": "^0.35.0",
    "reflect-metadata": "0.1.2",
    "jquery": "^2.1.4",
    "less": "^2.5.3",
    "lodash": "^3.10.1",
    "rxjs": "5.0.0-beta.2",
    "systemjs": "0.19.22",
    "ts-loader": "^0.7.2",
    "zone.js": "0.6.6"
  },
  "devDependencies": {
    "del": "^2.0.2",
    "event-stream": "^3.3.1",
    "copy-webpack-plugin": "^0.3.3",
    "css-loader": "^0.23.0",
    "exports-loader": "0.6.2",
    "expose-loader": "^0.7.1",
    "file-loader": "^0.8.4",
    "gulp": "^3.9.0",
    "html-webpack-plugin": "^1.7.0",
    "http-server": "^0.8.5",
    "imports-loader": "^0.6.4",
    "istanbul-instrumenter-loader": "^0.1.3",
    "json-loader": "^0.5.3",
    "nodemon":  "^1.8.1",
    "phantomjs": "^1.9.18",
    "phantomjs-polyfill": "0.0.1",
    "protractor": "^3.0.0",
    "raw-loader": "0.5.1",
    "reflect-metadata": "0.1.2",
    "remap-istanbul": "^0.5.1",
    "rimraf": "^2.4.4",
    "style-loader": "^0.13.0",
    "ts-helper": "0.0.1",
    "ts-loader": "^0.7.2",
    "tsconfig-lint": "^0.4.3",
    "tslint": "^3.2.0",
    "tslint-loader": "^2.1.0",
    "typedoc": "^0.3.12",
    "typescript": "1.8.9",
    "typings": "^0.6.1",
    "url-loader": "^0.5.6",
    "webpack": "^1.12.9",
    "webpack-dev-server": "^1.12.1",
    "webpack-md5-hash": "0.0.4"    
  },
  "scripts": {
    "tsc": "tsc -p . -w",
    "start": "nodemon --ignore htm,html --ext cs,js --exec \"dnx web\" -V",
    "static": "nodemon --watch ./client --ext html,css --exec \"gulp deploy-client\" -V",
    "pre-build": "gulp deploy-client",
    "webpack": "webpack",
    "webpack-watch": "webpack --watch",
    "clean": "gulp cleanwww",
    "build": "npm run pre-build && npm run webpack",
    "dnx": "dnx web"
  }
}