Just a small style improvement.

backend/src/Squidex.Domain.Apps.Entities/Apps/State/AppState.cs

@@ -10,6 +10,7 @@ using System.Runtime.Serialization;
 using Squidex.Domain.Apps.Core.Apps;
 using Squidex.Domain.Apps.Core.Contents;
 using Squidex.Domain.Apps.Events.Apps;
+using Squidex.Infrastructure.Commands;
 using Squidex.Infrastructure.EventSourcing;
 using Squidex.Infrastructure.Reflection;
 using Squidex.Infrastructure.States;
@@ -68,7 +69,7 @@ namespace Squidex.Domain.Apps.Entities.Apps.State
                         return true;
                     }
 
-                case AppUpdated e when !string.Equals(e.Label, Label) || !string.Equals(e.Description, Description):
+                case AppUpdated e when Is.Change(Label, e.Label) || Is.Change(Description, e.Description):
                     {
                         SimpleMapper.Map(e, this);
 
@@ -81,7 +82,7 @@ namespace Squidex.Domain.Apps.Entities.Apps.State
                 case AppImageRemoved e when Image != null:
                     return UpdateImage(e, ev => null);
 
-                case AppPlanChanged e when !string.Equals(Plan?.PlanId, e.PlanId):
+                case AppPlanChanged e when Is.Change(Plan?.PlanId, e.PlanId):
                     return UpdatePlan(e, ev => AppPlan.Build(ev.Actor, ev.PlanId));
 
                 case AppPlanReset e when Plan != null:

backend/src/Squidex.Domain.Apps.Entities/Assets/State/AssetFolderState.cs

@@ -9,6 +9,7 @@ using System;
 using System.Runtime.Serialization;
 using Squidex.Domain.Apps.Events.Assets;
 using Squidex.Infrastructure;
+using Squidex.Infrastructure.Commands;
 using Squidex.Infrastructure.EventSourcing;
 using Squidex.Infrastructure.Reflection;
 
@@ -41,14 +42,14 @@ namespace Squidex.Domain.Apps.Entities.Assets.State
                         return true;
                     }
 
-                case AssetFolderRenamed e when e.FolderName != FolderName:
+                case AssetFolderRenamed e when Is.ChangeWhenDefined(FolderName, e.FolderName):
                     {
                         FolderName = e.FolderName;
 
                         return true;
                     }
 
-                case AssetFolderMoved e when e.ParentId != ParentId:
+                case AssetFolderMoved e when Is.Change(ParentId, e.ParentId):
                     {
                         ParentId = e.ParentId;
 

backend/src/Squidex.Domain.Apps.Entities/Assets/State/AssetState.cs

@@ -102,14 +102,14 @@ namespace Squidex.Domain.Apps.Entities.Assets.State
                     {
                         var hasChanged = false;
 
-                        if (Is.Change(FileName, e.FileName))
+                        if (Is.ChangeWhenDefined(FileName, e.FileName))
                         {
                             FileName = e.FileName;
 
                             hasChanged = true;
                         }
 
-                        if (Is.Change(Slug, e.Slug))
+                        if (Is.ChangeWhenDefined(Slug, e.Slug))
                         {
                             Slug = e.Slug;
 

backend/src/Squidex.Infrastructure/Commands/Is.cs

@@ -5,6 +5,7 @@
 //  All rights reserved. Licensed under the MIT license.
 // ==========================================================================
 
+using System;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 
@@ -12,7 +13,17 @@ namespace Squidex.Infrastructure.Commands
 {
     public static class Is
     {
-        public static bool Change(string? oldValue, string? newValue)
+        public static bool Change(Guid oldValue, Guid newValue)
+        {
+            return !Equals(oldValue, newValue);
+        }
+
+        public static bool Change(string? oldValue, string newValue)
+        {
+            return !Equals(oldValue, newValue);
+        }
+
+        public static bool ChangeWhenDefined(string? oldValue, string? newValue)
         {
             return !string.IsNullOrWhiteSpace(newValue) && !string.Equals(oldValue, newValue);
         }