System.FormatException: Invalid input string format.
w System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
w System.Number.ParseDecimal(String value, NumberStyles options, NumberFormatInfo numfmt)
w b.a(MetroLabel A_0, String A_1, String A_2)
w MirageSEO.Form1.ab(Object A_0, EventArgs A_1)
w System.Windows.Forms.Form.OnActivated(EventArgs e)
w MetroFramework.Forms.MetroForm.OnActivated(EventArgs e)
w System.Windows.Forms.Form.set_Active(Boolean value)
w System.Windows.Forms.Form.WmActivate(Message& m)
w System.Windows.Forms.Form.WndProc(Message& m)
w MetroFramework.Forms.MetroForm.WndProc(Message& m)
w System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
w System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
w System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)