public void MessagesModel_Save_FormLocationAndSize()
        {
            // Arrange
            var preferences = new InMemoryPreferencesProvider();
            var model       = new MessagesModel(preferences, null);

            model.FormLocation = new Point(50, 60);
            model.FormSize     = new Size(70, 80);
            // Act
            model.Save();
            // Assert
            Assert.AreEqual(new Point(50, 60), preferences.Get <Point>(Preference.MessagesFormLocation));
            Assert.AreEqual(new Size(70, 80), preferences.Get <Size>(Preference.MessagesFormSize));
        }