Update README.md

Add code quotes

README.md

@@ -8,18 +8,20 @@ You need to do few steps to start working with client:
 * Create your personal 'Nova Poshta' account and generate your Api key. Detailed how to do this you can find [here](https://devcenter.novaposhta.ua/start).
 * You need to create class implementing interface **INovaPoshtaGateway**. Or you can use our default class **DefaultNovaPoshtaGateway**. 
 Copy your API key created at first step and paste it in ApiKey parameter or your gateway instance like here:
-
-`using Baroque.NovaPoshta.Client;`
-
-`var gateway = new DefaultNovaPoshtaGateway("yourkey");`
+```C#
+using Baroque.NovaPoshta.Client;
+var gateway = new DefaultNovaPoshtaGateway("yourkey");
+```
 * Great! You create instance of Nova Poshta gateway. Now you can use API services, which are located in namespace _Baroque.NovaPoshta.Client.Services_. For example you can try get **CommonService**.
 
-`using Baroque.NovaPoshta.Client.Services.Common;`
 
-`void Run()
+```C#
+using Baroque.NovaPoshta.Client.Services.Common;
+void Run()
 {
     var gateway = new DefaultNovaPoshtaGateway("yourkey");
     var commonService = new CommonService(gateway);
-}`
+}
+```
 * All other services connect by same way.
 * Now you can use all other services in your application.