隐藏代码后，功能区按钮仍然可见

我尝试隐藏按钮后点击它，我尝试以下代码:

btnEdit.Visible = false;

但是按钮仍然可见，一旦我点击它它就隐藏了

完整代码:

    void SwitchMenu(bool showEdit)
    {
        boxEdit.Visible = showEdit;                                    
        foreach (var item in boxEdit.Items)
        {
            item.Visible = showEdit;
        }
        boxCreate.Visible = !showEdit;
        foreach (var item in boxCreate.Items)
        {
            item.Visible = !showEdit;
        }                                  
    }