Listbox Selected item

file6.cs

 //Event handler for marks button given in the mylisybox
        private void Marks_button_click(object sender, RoutedEventArgs e)
        {
            //Get the data object that represents the current selected item
            Resultclass myobject = (sender as Button).DataContext as Resultclass;

            //Get the selected ListBoxItem container instance of the item whose marks button is pressed
            ListBoxItem pressedItem = this.mylistbox.ItemContainerGenerator.ContainerFromItem(myobject) as ListBoxItem;

            //Checks whether it is not null 
            if (pressedItem != null)
            { 
                //Now you can get the name and marks of selected student from the myobject

                //Display the name and marks of Selected Student in the textblocks given below the listbox.
                Studentnameblock.Text = myobject.name;
                marksblock.Text = myobject.marks.ToString(); ;
            }
        }