Update README - add sample view of Event Store

Return null from SqlStreamAggregateStore.Load method if domain events are not exist

Author: kgrzybek

README.md

@@ -1630,6 +1630,17 @@ internal class SubscriptionDetailsProjector : ProjectorBase, IProjector
 }
 
 ```
+#### Sample view of Event Store
+
+Sample *Event Store* view after execution of SubscriptionLifecycleTests Integration Test which includes following steps:
+1. Creating Price List
+2. Buying Subscription
+3. Renewing Subscription
+4. Expiring Subscription
+
+looks like this (*SQL Stream Store* table - *payments.Messages*):
+
+![](docs/Images/ES_event_store_db_sample.png)
 
 ## 4. Technology
 

docs/Images/ES_event_store_db_sample.png

@@ -69,6 +69,11 @@ public async Task<T> Load<T>(AggregateId<T> aggregateId) where T : AggregateRoot
                 }
             } while (!readStreamPage.IsEnd);
 
+            if (!domainEvents.Any())
+            {
+                return null;
+            }
+
             var aggregate = (T)Activator.CreateInstance(typeof(T), true);
 
             aggregate.Load(domainEvents);