From 43909be36d32444939a1c4b4d7c41ee816a11b1c Mon Sep 17 00:00:00 2001
From: Sambo Chea <sombochea@cubetiqs.com>
Date: Wed, 24 Mar 2021 14:22:56 +0700
Subject: [PATCH] Add code example for readme

---
 README.md | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/README.md b/README.md
index b5dfba9..a64d907 100644
--- a/README.md
+++ b/README.md
@@ -5,5 +5,32 @@
 - [x] Support functions (getConfig, getConfigOrNull, hasConfigKey)
 - [x] Support nullsafety (dart 2.12.2+)
 
+# Example
+```dart
+import 'package:configurable/dotenv_configuration_provider.dart';
+import 'package:configurable/simple_configuration_provider.dart';
+import 'package:configurable/system_config.dart';
+
+void main() {
+  var key = 'app.name';
+  var value = 'CUBETIQ Solution';
+
+  // in-memory provider (built-in)
+  var simpleProvider = SimpleConfigurationProvider();
+  SystemConfig.setProvider(simpleProvider);
+  var result1 = SystemConfig.getOrNull(key, defaultValue: value);
+  // output: CUBETIQ Solution
+  print(result1);
+
+  // dotenv provider (from file .env)
+  var dotenvProvider = DotenvConfigurationProvider();
+  SystemConfig.setProvider(dotenvProvider);
+  var result2 = SystemConfig.getOrNull('HOME');
+
+  // output: user's home directory
+  print(result2);
+}
+```
+
 # Contributors
 - Sambo Chea <sombochea@cubetiqs.com>
\ No newline at end of file