Angular Cannot find name 'Angular' Visual Studio 2015 Dotnet MVC web app - angularjs

Question

So I am new in angular and i am working on visual studio 2015 update 3.
Simple Angular app work perfectly on VS2015 dotnet MVC project.
I have a problem when i downgradecomponent in app.module.ts file
angular.module('app').directive('viewTest', downgradeComponent({ component: ViewTestComponent }));
error is on angular it says cannot find name 'angular'
my package.json file
{
"name": "angular-quickstart",
"version": "1.0.0",
"description": "QuickStart package.json from the documentation, supplemented with testing support",
"scripts": {
"build": "tsc -p src/",
"build:watch": "tsc -p src/ -w",
"build:e2e": "tsc -p e2e/",
"serve": "lite-server -c=bs-config.json",
"serve:e2e": "lite-server -c=bs-config.e2e.json",
"prestart": "npm run build",
"start": "concurrently \"npm run build:watch\" \"npm run serve\"",
"pree2e": "npm run build:e2e",
"e2e": "concurrently \"npm run serve:e2e\" \"npm run protractor\" --kill-others --success first",
"preprotractor": "webdriver-manager update",
"protractor": "protractor protractor.config.js",
"pretest": "npm run build",
"test": "concurrently \"npm run build:watch\" \"karma start karma.conf.js\"",
"pretest:once": "npm run build",
"test:once": "karma start karma.conf.js --single-run",
"lint": "tslint ./src/**/*.ts -t verbose"
},
"keywords": [],
"author": "",
"license": "MIT",
"dependencies": {
"#angular/common": "~4.3.4",
"#angular/compiler": "~4.3.4",
"#angular/core": "~4.3.4",
"#angular/forms": "~4.3.4",
"#angular/http": "~4.3.4",
"#angular/platform-browser": "~4.3.4",
"#angular/platform-browser-dynamic": "~4.3.4",
"#angular/router": "~4.3.4",
"#angular/upgrade": "~4.3.4",
"angular-in-memory-web-api": "~0.3.0",
"systemjs": "0.19.40",
"core-js": "^2.4.1",
"rxjs": "5.5.10",
"zone.js": "^0.8.4"
},
"devDependencies": {
"concurrently": "^3.2.0",
"lite-server": "^2.2.2",
"typescript": "~2.8.1",
"canonical-path": "0.0.2",
"tslint": "^3.15.1",
"lodash": "^4.16.4",
"jasmine-core": "~2.4.1",
"karma": "^1.3.0",
"karma-chrome-launcher": "^2.0.0",
"karma-cli": "^1.0.1",
"karma-jasmine": "^1.0.2",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~4.0.14",
"rimraf": "^2.5.4",
"#types/node": "^6.0.46",
"#types/jasmine": "2.5.36"
},
"repository": {}
}
I also declare this.
declare var angular: any;
by doing that project run with no error. but nothing is rendering.
when i inspect element in browser it show me the converted component but not rendering any other angularjs component.
need help thanks