/// <summary>
///
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void StackPanel_MouseEnter(object sender, MouseEventArgs e)
{
backgroundMusic.PlayButtonEnter();
}
/// <summary>
/// The sound will play when mouse enter different TabItem.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void TabItem_MouseEnter(object sender, MouseEventArgs e)
{
musicPlayer.PlayButtonEnter();
}