makes MB event an INotification

src/Umbraco.Web.Common/ModelBinders/ModelBindingError.cs

@@ -0,0 +1,43 @@
+using System;
+using System.Text;
+using Umbraco.Core.Events;
+
+namespace Umbraco.Web.Common.ModelBinders
+{
+    /// <summary>
+    /// Contains event data for the <see cref="ModelBindingException"/> event.
+    /// </summary>
+    public class ModelBindingError : INotification
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ModelBindingError"/> class.
+        /// </summary>
+        public ModelBindingError(Type sourceType, Type modelType, StringBuilder message)
+        {
+            SourceType = sourceType;
+            ModelType = modelType;
+            Message = message;
+        }
+
+        /// <summary>
+        /// Gets the type of the source object.
+        /// </summary>
+        public Type SourceType { get; set; }
+
+        /// <summary>
+        /// Gets the type of the view model.
+        /// </summary>
+        public Type ModelType { get; set; }
+
+        /// <summary>
+        /// Gets the message string builder.
+        /// </summary>
+        /// <remarks>Handlers of the event can append text to the message.</remarks>
+        public StringBuilder Message { get; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether the application should restart.
+        /// </summary>
+        public bool Restart { get; set; }
+    }
+}