some stauts codes

Pilz.Net/Api/Server/BaseChildItemHandler.cs

@@ -2,6 +2,7 @@
 using Pilz.Extensions.Reflection;
 using Pilz.Net.Extensions;
 using System.Diagnostics;
+using System.Net;
 
 namespace Pilz.Net.Api.Server;
 
@@ -45,7 +46,7 @@ public abstract class BaseChildItemHandler<TEntity, TParent, TUpdateMsg>(IApiSer
             return result;
         GetChilds(parentEntity).Add(entity);
         server.Manager.Save(parentEntity, true);
-        return ToClient(entity).ToItemResult();
+        return ToClient(entity).ToItemResult(HttpStatusCode.Created);
     }
 
     public abstract IList<TEntity> GetChilds(TParent parent);

Pilz.Net/Api/Server/BaseItemHandler.cs

@@ -2,6 +2,7 @@
 using Pilz.Extensions.Reflection;
 using Pilz.Net.Extensions;
 using System.Diagnostics;
+using System.Net;
 
 namespace Pilz.Net.Api.Server;
 
@@ -34,6 +35,6 @@ public abstract class BaseItemHandler<TEntity, TUpdateMsg>(IApiServer server)
         if (UpdateEntity(entity, msg) is ApiResult result)
             return result;
         server.Manager.Save(entity, true);
-        return ToClient(entity).ToItemResult();
+        return ToClient(entity).ToItemResult(HttpStatusCode.Created);
     }
 }

Pilz.Net/Extensions/ApiMessageExtensions.cs

@@ -1,22 +1,33 @@
 using Pilz.Net.Api;
 using Pilz.Net.Api.Messages;
+using System.Net;
 
 namespace Pilz.Net.Extensions;
 
 public static class ApiMessageExtensions
 {
     public static ApiResult ToItemResult<T>(this T? @this)
+    {
+        return @this.ToItemResult(@this is not null ? HttpStatusCode.OK : HttpStatusCode.NoContent);
+    }
+
+    public static ApiResult ToItemResult<T>(this T? @this, HttpStatusCode statusCode)
     {
         if (@this == null)
             return ApiResult.NotFound();
-        return ApiResult.Ok(@this.ToItemMsg());
+        return new ApiResult(statusCode, @this.ToItemMsg());
     }
 
     public static ApiResult ToItemsResult<T>(this IEnumerable<T>? @this)
+    {
+        return @this.ToItemsResult(@this is not null && @this.Any() ? HttpStatusCode.OK : HttpStatusCode.NoContent);
+    }
+
+    public static ApiResult ToItemsResult<T>(this IEnumerable<T>? @this, HttpStatusCode statusCode)
     {
         if (@this == null)
             return ApiResult.NotFound();
-        return ApiResult.Ok(@this.ToItemsMsg());
+        return new ApiResult(statusCode, @this.ToItemMsg());
     }
 
     public static GeneralItemMessages<T>.Item ToItemMsg<T>(this T @this)