Makes model props readonly/immutable

src/Umbraco.Core/Models/Blocks/BlockListLayoutReference.cs

@@ -21,13 +21,13 @@ namespace Umbraco.Core.Models.Blocks
         /// The Id of the data item
         /// </summary>
         [DataMember(Name = "udi")]
-        public Udi Udi { get; set; }
+        public Udi Udi { get; }
 
         /// <summary>
         /// The settings for the layout item
         /// </summary>
         [DataMember(Name = "settings")]
-        public IPublishedElement Settings { get; set; }
+        public IPublishedElement Settings { get; }
 
         /// <summary>
         /// The data item referenced
@@ -36,6 +36,6 @@ namespace Umbraco.Core.Models.Blocks
         /// This is ignored from serialization since it is just a reference to the actual data element
         /// </remarks>
         [IgnoreDataMember]
-        public IPublishedElement Data { get; set; }
+        public IPublishedElement Data { get; }
     }
 }

src/Umbraco.Core/Models/Blocks/BlockListModel.cs

@@ -16,15 +16,11 @@ namespace Umbraco.Core.Models.Blocks
             Layout = layout;
         }
 
-        public BlockListModel()
-        {
-        }
-
         /// <summary>
         /// The layout items of the Block List editor
         /// </summary>
         [DataMember(Name = "layout")]
-        public IEnumerable<BlockListLayoutReference> Layout { get; set; }
+        public IEnumerable<BlockListLayoutReference> Layout { get; }
 
         
     }