implements some internal web exception

BookAStar/BookAStar/Helpers/NotIdentifiedException.cs

@@ -0,0 +1,10 @@
+using System;
+
+namespace BookAStar
+{
+    public class NotIdentifiedException : Exception
+    {
+        public NotIdentifiedException(string message) : base(message) { }
+    }
+}
+

BookAStar/BookAStar/Helpers/ServiceNotAvailable1.cs

@@ -0,0 +1,10 @@
+using System;
+
+namespace BookAStar
+{
+    public class ServiceNotAvailable : Exception
+    {
+        public ServiceNotAvailable(string message, Exception innerException) : base(message, innerException) { }
+
+    }
+}