private async void btninternet_Click(object sender, EventArgs e)
{
Mp3Player.Pause();
Systeminfo.Status = false;
Ucinternet ucinternet = Ucinternet.Instance;
pnlMain.Controls.Clear();
panelDockL.Visible = false;
pnlMain.Controls.Add(panelDockL);
pnlMain.Visible = false;
pnlMain.Controls.Add(ucinternet);
pnlMain.Visible = true;
panelleft.Height = btninternet.Height;
panelleft.Top = btninternet.Top;
}