GitBook: [master] one page modified

docs/message-types/events.md

@@ -1,2 +1,41 @@
 # Events
 
+Domain events represent business changes which already happened.
+
+## Communication Guide Table
+
+| Triggered by | Description |
+| :--- | :--- |
+| AggregateRoot | TODO |
+
+{% hint style="success" %}
+**You can/should/must...**
+
+* an event **must** be immutable
+* an event **must** represent a domain event which already happened with a name in past tense
+* an event **can** be dispatched only by one aggregate
+{% endhint %}
+
+## Examples
+
+```csharp
+[DataContract(Name = "fff400a3-1af0-4332-9cf5-b86c1c962a01")]
+public class AccountSuspended : IEvent
+{
+    AccountSuspended() { }
+
+    public AccountSuspended(AccountId id)
+    {
+        Id = id;
+    }
+
+    [DataMember(Order = 1)]
+    public AccountId Id { get; private set; }
+
+    public override string ToString()
+    {
+        return "Account was suspended";
+    }
+}
+```
+