How to add Border Radius to Container in Flutter?

In this example, I'm going to share the code on how to add Border Radius to a Container.

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  double padValue = 0;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
          appBar: AppBar(
            title: Text("Border Radius to Container"),
          ),
          body: Container(
            margin: EdgeInsets.all(100.0),
            decoration: BoxDecoration(
                color: Colors.orange,
                shape: BoxShape.rectangle,
                borderRadius: BorderRadius.only(
                    topLeft: Radius.circular(25.0),
                    bottomRight: Radius.circular(25.0))),
          )),
    );
  }
}