Update readme.md

samples/DotNet/Rbac/CustomRole/readme.md

@@ -1,10 +1,27 @@
 # Receive events with the Event Processor Host in .NET Standard with a custom role which grants Listen claim for Event Hubs and blob claims for Storage accounts.
 
-Here is the custom role definition you can use to run this sample. Once created, assign your custom role to Storage and Event Hubs resources.
+## Prerequisites
 
-{
-	"Name": "Custom role for RBAC sample",
-    "Id": "8ddab47f-cf99-4b04-8fc3-1d2d857fb931",
+* [Microsoft Visual Studio 2015 or 2017](http://www.visualstudio.com).
+* [.NET Core Visual Studio 2015 or 2017 tools](http://www.microsoft.com/net/core).
+* An Azure subscription.
+* [An event hub namespace and an event hub](event-hubs-quickstart-namespace-portal.md).
+* An Azure Storage account.
+
+## Run the sample
+
+To run the sample, follow these steps:
+
+1. Clone or download this GitHub repo.
+2. [Create an Event Hubs namespace and an event hub](https://docs.microsoft.com/azure/event-hubs/event-hubs-create).
+3. Create a Storage account to host a blob container, needed for lease management by the Event Processor Host.
+3. [Create a new custom role](https://docs.microsoft.com/en-us/azure/role-based-access-control/custom-roles) with the definition below.
+4. [Create a new AAD (Azure Active Directory) application](https://docs.microsoft.com/en-us/azure/active-directory/develop/howto-create-service-principal-portal).
+5. Assign AAD application to both Event Hubs namespace and Storage account with the custom role you just created.
+
+```{
+        "Name": "Custom role for RBAC sample",
+        "Id": "8ddab47f-cf99-4b04-8fc3-1d2d857fb931",
 	"Description": "Test role",
 	"IsCustom": true,
 	"Actions": [
@@ -19,4 +36,8 @@ Here is the custom role definition you can use to run this sample. Once created,
 	"AssignableScopes": [
 	  "/subscriptions/your-subscription-id"
 	]
-}
+}```
+
+6. Update the sample with Event Hubs namespace and Storage account name.
+7. Run [Sender application](https://github.com/Azure/azure-event-hubs/tree/serkar.AddCustomRbacEhSample/samples/DotNet/Microsoft.Azure.EventHubs/SampleSender) to send some number of messages to your event hub.
+8. Run the CustomRole sample to receive those events back.