If ” is an Angular component, then verify that it is part of this module

I am new in Angular2. I have tried to create a component but showing an error.

This is the app.component.ts file.

import { Component } from '@angular/core';
import { MyComponentComponent } from './my-component.component';

@Component({
  selector: 'my-app',
  template: `
    <h1>Hello {{name}}</h1>
    <h4>Something</h4>
    <my-component></my-component>
  `,
  directives: [MyComponentComponent]
})
export class AppComponent { name="Sam" }

This is the component which i want to create.

import { Component } from '@angular/core';

@Component({
selector: 'my-component',
template: `
    <p>This is my article</p>
`
})

export class MyComponentComponent {

}

Showing the two errors:

1. If my-component is an Angular component, then verify that it is part of this module.
2. If my-component is a Web Component then add CUSTOM_ELEMENTS_SCHEMA to the @NgModule.schemas of this component to suppress this message.

Please Help.