Royal-Code
diff --git a/‎RoyalCode.EnterprisePatterns/RoyalCode.DomainEvents/DomainEventCollection.cs‎
Lines changed: 1 addition & 2 deletions b/‎RoyalCode.EnterprisePatterns/RoyalCode.DomainEvents/DomainEventCollection.cs‎
Lines changed: 1 addition & 2 deletions
diff --git a/‎RoyalCode.EnterprisePatterns/RoyalCode.DomainEvents/_pollyfill.cs‎
Lines changed: 0 additions & 15 deletions b/‎RoyalCode.EnterprisePatterns/RoyalCode.DomainEvents/_pollyfill.cs‎
Lines changed: 0 additions & 15 deletions
@@ -93,8 +93,7 @@ public void Observe(Action<IDomainEvent> observerAction)
     /// <inheritdoc />
     public void RemoveObserver(Action<IDomainEvent> observerAction)
     {
-        if (observerAction is null)
-            throw new ArgumentNullException(nameof(observerAction));
+        ArgumentNullException.ThrowIfNull(observerAction);
 
         observers?.Remove(observerAction);
     }
Original file line number	Diff line number	Diff line change
`@@ -93,8 +93,7 @@ public void Observe(Action<IDomainEvent> observerAction)`
`93`	`93`	`/// <inheritdoc />`
`94`	`94`	`public void RemoveObserver(Action<IDomainEvent> observerAction)`
`95`	`95`	`{`
`96`		`- if (observerAction is null)`
`97`		`- throw new ArgumentNullException(nameof(observerAction));`
	`96`	`+ ArgumentNullException.ThrowIfNull(observerAction);`
`98`	`97`
`99`	`98`	`observers?.Remove(observerAction);`
`100`	`99`	`}`