System.FormatEx ception: Input string was not in a correct format.
at System.Number.S tringToNumber(S tring str, NumberStyles options, NumberBuffer& number, NumberFormatInf o info, Boolean parseDecimal)
at System.Number.P arseInt32(Strin g s, NumberStyles style, NumberFormatInf o info)
at System.Convert. ToInt32(String value)
at Robo.FormRobo.g et_sleepHours()
at Robo.FormRobo.b tnFight_Click(O bject sender, EventArgs e)
at System.Windows. Forms.Control.O nClick(EventArg s e)
at System.Windows. Forms.Button.On Click(EventArgs e)
at System.Windows. Forms.Button.On MouseUp(MouseEv entArgs mevent)
at System.Windows. Forms.Control.W mMouseUp(Messag e& m, MouseButtons button, Int32 clicks)
at System.Windows. Forms.Control.W ndProc(Message& m)
at System.Windows. Forms.ButtonBas e.WndProc(Messa ge& m)
at System.Windows. Forms.Button.Wn dProc(Message& m)
at System.Windows. Forms.Control.C ontrolNativeWin dow.OnMessage(M essage& m)
at System.Windows. Forms.Control.C ontrolNativeWin dow.WndProc(Mes sage& m)
at System.Windows. Forms.NativeWin dow.Callback(In tPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Number.S tringToNumber(S tring str, NumberStyles options, NumberBuffer& number, NumberFormatInf o info, Boolean parseDecimal)
at System.Number.P arseInt32(Strin g s, NumberStyles style, NumberFormatInf o info)
at System.Convert. ToInt32(String value)
at Robo.FormRobo.g et_sleepHours()
at Robo.FormRobo.b tnFight_Click(O bject sender, EventArgs e)
at System.Windows. Forms.Control.O nClick(EventArg s e)
at System.Windows. Forms.Button.On Click(EventArgs e)
at System.Windows. Forms.Button.On MouseUp(MouseEv entArgs mevent)
at System.Windows. Forms.Control.W mMouseUp(Messag e& m, MouseButtons button, Int32 clicks)
at System.Windows. Forms.Control.W ndProc(Message& m)
at System.Windows. Forms.ButtonBas e.WndProc(Messa ge& m)
at System.Windows. Forms.Button.Wn dProc(Message& m)
at System.Windows. Forms.Control.C ontrolNativeWin dow.OnMessage(M essage& m)
at System.Windows. Forms.Control.C ontrolNativeWin dow.WndProc(Mes sage& m)
at System.Windows. Forms.NativeWin dow.Callback(In tPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)