exclude legacy Permissions properties from serialization/API payload

Oqtane.Shared/Models/Folder.cs

@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations.Schema;
 using System.Text.Json;
+using System.Text.Json.Serialization;
 
 namespace Oqtane.Models
 {
@@ -85,18 +86,19 @@ namespace Oqtane.Models
         [NotMapped]
         public bool HasChildren { get; set; }
 
+        #region Deprecated Properties
+
         [Obsolete("The Permissions property is deprecated. Use PermissionList instead", false)]
         [NotMapped]
+        [JsonIgnore] // exclude from API payload
         public string Permissions
         {
             get
             {
                 return JsonSerializer.Serialize(PermissionList);
             }
-            set
-            {
-                PermissionList = JsonSerializer.Deserialize<List<Permission>>(Permissions);
-            }
         }
+
+        #endregion
     }
 }