Remove the JSON.NET TypeNameHandling from the serializer

Author: johelvisguzman

src/DotNetToolkit.Repository.Json/JsonRepositoryBase.cs

@@ -49,8 +49,7 @@ protected override void OnSaved(StreamWriter writer, IEnumerable<TEntity> entiti
             var serializer = new JsonSerializer
             {
                 Formatting = Formatting.Indented,
-                ContractResolver = new CamelCasePropertyNamesContractResolver(),
-                TypeNameHandling = TypeNameHandling.All
+                ContractResolver = new CamelCasePropertyNamesContractResolver()
             };
 
             serializer.Serialize(writer, entities);