Just add missing message for destroy command ask N for hyper-v provider.

mitchellh/vagrant#3752

plugins/providers/hyperv/action.rb

@@ -216,6 +216,7 @@ module VagrantPlugins
       autoload :StopInstance, action_root.join('stop_instance')
       autoload :SuspendVM, action_root.join("suspend_vm")
       autoload :WaitForIPAddress, action_root.join("wait_for_ip_address")
+      autoload :MessageWillNotDestroy, action_root.join("message_will_not_destroy")
     end
   end
 end

plugins/providers/hyperv/action/message_will_not_destroy.rb

@@ -0,0 +1,17 @@
+module VagrantPlugins
+  module HyperV
+    module Action
+      class MessageWillNotDestroy
+        def initialize(app, env)
+          @app = app
+        end
+
+        def call(env)
+          env[:ui].info I18n.t("vagrant.commands.destroy.will_not_destroy",
+                              :name => env[:machine].name)
+          @app.call(env)
+        end
+      end
+    end
+  end
+end