SimpleNavigation.cs

        private async Task<bool> Navigate(CopyItem parameter)
        {
            try
            {
                return await this.PushPageAsNewInstanceAsync<SamplePageViewModel>(vm =>
                {
                    vm.Subject = parameter.Title;
                    vm.Copy = parameter.Body;
                });
            }
            catch (Exception ex)
            {
                await Observable.Throw<Unit>(ex);
                return false;
            }
        }