The file "C:/sendbox/mean/client/app/app.component.ts" is not included in the TypeScript...

I have set up an Angular 2 project following the Angular 2 docs when I want to import the Component from @angular/core typescript gives me this error:

The file "C:/sendbox/mean/client/app/app.component.ts" is not included in the TypeScript compilation context. If this is not intended, please check the "files" or "filesGlob" section of your tsconfig.json file.at line 1 col 1
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