how to add links in react js

import React from 'react';
import { Link } from 'react-router';

class List extends React.Component {
    render() {
        return (
            <div>
                <p>Please choose a repository from the list below.</p>
                <ul>
                    <li><Link to="/react">React</Link></li>
                </ul>
            </div>
        );
    }
}

export default List;import { Link } from 'react-router-dom';

classAppextendsComponent {
    render() {
        return (
            <div class="container">
                <nav>
<Link to="/">Home</Link>
<Link to="/dashboard">Dashboard</Link>
                </nav>
                <Route
                    path="/"
                    component={HomeComponent}
                    exact 
                />
                <Route
                    path="/dashboard"
                    component={DashboardComponent} 
                />
            </div>
        );
    }
}