private void EnterButton_Click(object sender, RoutedEventArgs e)
        {
            if (CharList.Text == null)
            {
                System.Windows.MessageBox.Show("You need to enter characters to be removed!");
                return;
            }
            CharactersToBeDeleted = CharList.Text;                  //Sets words equal to the characters form the extbox

            ListOfCharacters = CharactersToBeDeleted.ToCharArray(); //Extracts the characters from the string in
            //words to be deleted and stores them in the global array

            CharList.Clear(); //Clears the CharList Array for future use

            ListBoxChar.DataContext = ListOfCharacters;
            //Sets ListBox's DataContext to the List of CHaracters array
        }