private void TextBoxAvgSet_TextChanged(object sender, EventArgs e)
        {
            Setter<int>(sender as TextBox, new IntPtrVoid(camera.Average),
                new VoidPtrInt(camera.Average), "Average", cameraControlGUI.LabelAvgShow);
        }

        private void Setter<InType>(TextBox sender, Delegate output, Delegate input, string str, Label shower)
        {
            string text = sender.Text;

            if (text.Contains("\r\n"))
            {
                sender.Text = text = text.Replace("\r\n", "");
                var converter = TypeDescriptor.GetConverter(typeof(InType));
                try
                {
                    var value = (InType)converter.ConvertFromString(text);
                    input.DynamicInvoke(value);
                    if (!EqualityComparer<InType>.Default.Equals(value, (InType)output.DynamicInvoke()))
                    {
                        cameraControlGUI.LabelErrorCodeShow.Text = "無法設定" + str + "，將設定改回預設值";
                        sender.Text = Convert.ToString(output.DynamicInvoke());
                    }                    
                    shower.Text = Convert.ToString(output.DynamicInvoke());
                }
                catch (NotSupportedException exception)
                {
                    cameraControlGUI.LabelErrorCodeShow.Text = exception.ToString();
                }
                catch (Exception exception)
                {
                    cameraControlGUI.LabelErrorCodeShow.Text = exception.ToString();
                }
            }
        }