BaconographyWP8.View.ReplyViewPage.TextBox_KeyUp C# (CSharp) Method

		private void TextBox_KeyUp(object sender, System.Windows.Input.KeyEventArgs e)
		{
            var textbox = sender as TextBox;
            if (textbox != null)
            {
                var vm = this.DataContext as ReplyViewModel;
                if (vm != null)
                {
                    if (vm.ReplyBody != textbox.Text)
                        vm.ReplyBody = textbox.Text;
                }
            }
		}