Update readme

README.md

@@ -1,2 +1,84 @@
+<p align="center">
+<img src="https://github.com/chkr1011/MQTTnet/blob/master/Images/Logo_128x128.png?raw=true" width="128">
+</p>
+
 # MQTTnet
 MQTTnet is a .NET library for MQTT based communication. It provides a MQTT client and a MQTT server.
+
+# MqttClient
+## Example
+
+```c#
+var options = new MqttClientOptions
+{
+    Server = "localhost"
+};
+
+var client = new MqttClientFactory().CreateMqttClient(options);
+client.ApplicationMessageReceived += (s, e) =>
+{
+    Console.WriteLine("### RECEIVED APPLICATION MESSAGE ###");
+    Console.WriteLine($"+ Topic = {e.ApplicationMessage.Topic}");
+    Console.WriteLine($"+ Payload = {Encoding.UTF8.GetString(e.ApplicationMessage.Payload)}");
+    Console.WriteLine($"+ QoS = {e.ApplicationMessage.QualityOfServiceLevel}");
+    Console.WriteLine($"+ Retain = {e.ApplicationMessage.Retain}");
+    Console.WriteLine();
+};
+
+client.Connected += async (s, e) =>
+{
+    Console.WriteLine("### CONNECTED WITH SERVER ###");
+
+    await client.SubscribeAsync(new List<TopicFilter>
+    {
+        new TopicFilter("#", MqttQualityOfServiceLevel.AtMostOnce)
+    });
+
+    Console.WriteLine("### SUBSCRIBED ###");
+};
+
+client.Disconnected += async (s, e) => 
+{
+    Console.WriteLine("### DISCONNECTED FROM SERVER ###");
+    await Task.Delay(TimeSpan.FromSeconds(5));
+
+    try
+    {
+        await client.ConnectAsync();
+    }
+    catch
+    {
+        Console.WriteLine("### RECONNECTING FAILED ###");
+    }
+};
+
+try
+{
+    await client.ConnectAsync();
+}
+catch
+{
+    Console.WriteLine("### CONNECTING FAILED ###");
+}
+
+Console.WriteLine("### WAITING FOR APPLICATION MESSAGES ###");
+
+while (true)
+{
+    Console.ReadLine();
+
+    var applicationMessage = new MqttApplicationMessage(
+        "A/B/C",
+        Encoding.UTF8.GetBytes("Hello World"),
+        MqttQualityOfServiceLevel.AtLeastOnce,
+        false
+    );
+
+    await client.PublishAsync(applicationMessage);
+}
+```
+
+# MqttServer
+
+## Example 
+TBD