UserControl设计错误，运行时一切正常

Question

当我拖放用户控件并更改属性ComponentType时，他找不到方法ComponentLogicFactory.CreateInstance（_ComponentType）。当我重建或编译时，编译器没有显示任何错误，当我运行模拟时，一切正常。我看着遮阳篷 WinForm designer error open designer，但对我来说没有，我有一个默认的构造函数。我没有使用单例或在运行时设置的任何变量。可能是什么原因？

 public ComponentTypes ComponentType
    {
        get
        {
            return this._ComponentType;
        }
        set
        {
            if(component == null)
            {
                _ComponentType = value;
                component = ComponentDesignFactory.CreateInstance(_ComponentType);
                if (!DesignMode)
                {
                    logicChip = ComponentLogicFactory.CreateInstance(_ComponentType);
                }

                if(NumberInputPins > component.MaxInput)
                {
                    this.NumberInputPins = component.MaxInput;
                }
                if(NumberOutputPins > component.MaxOutput)
                {
                    this.NumberOutputPins = component.MaxOutput;
                }
                RepositionComponent();
                gridPanel.Controls.Add(component);
            }
            else
            {
                MessageBox.Show("You can only change this once");
            }
        }
    }

  private static readonly IDictionary<ComponentTypes, Func<IComponent>> Creator =
    new Dictionary<ComponentTypes, Func<IComponent>>()
    {
        { ComponentTypes.And, () => new AndLogic() },
        { ComponentTypes.Or, () => new OrLogic() },
        { ComponentTypes.Not, () => new NotLogic() },
        { ComponentTypes.Led, () => new LedLogic() },
        { ComponentTypes.On, () => new OnLogic() },
        { ComponentTypes.Off, () => new OffLogic() },
        { ComponentTypes.Clock, () => new ClockLogic() },
    };

    public static IComponent CreateInstance(ComponentTypes typeComponent)
    {
        return Creator[typeComponent]();
    }