<ScrollViewer>
    <StackPanel x:Name="ShopList"/>
</ScrollViewer>

<Button
        x:Name="FoodAdd"
        Content="Добавить"
        Margin="287,102,0,17"
        Height="81"
        Width="130"
        BorderBrush="#FFFBEFEF"
        Foreground="#FFFFF7F7"
        Background="#FF56E0C7"
        FontFamily="/Assets/Fonts/Stolzl.otf#Stolzl Light"
        Click="NewItem"/>

private void NewItem(object sender, RoutedEventArgs e)
        {
            string item_name = NewFood.Text;
            if(item_name.Trim(' ') != "")
            {
                Button new_button = new Button();
                new_button.Content = item_name;
                new_button.Width = 350;
                new_button.HorizontalContentAlignment = HorizontalAlignment.Left;
                new_button.FontSize = 30;
                Thickness thick = new Thickness(0);
                thick.Bottom = 1;
                new_button.BorderThickness = thick;
                new_button.BorderBrush = new SolidColorBrush(Color.FromArgb(0xFF, 0x4F, 0x4E, 0x4E));
                new_button.Click += Delete_fromlist;

                    ShopList.Children.Add(new_button);
            }
            NewFood.Text = "";
            NewFood.Focus(FocusState.Keyboard);
        }

private void Delete_fromlist(object sender, RoutedEventArgs e)
{
    ((Button)sender).Content = "";
    ShopList.Children.Remove(((Button)sender));
}