Windows API 代码包 TaskDialog 缺少图标

我的图标TaskDialog缺失：

And in the taskbar:

我的代码是这样的：

using Microsoft.WindowsAPICodePack;
using Microsoft.WindowsAPICodePack.Dialogs;

...

TaskDialog taskDialog = new TaskDialog();
taskDialog.Caption = "Error";
taskDialog.InstructionText = "Test error message.";
taskDialog.Text = "Icon seems to be missing.";
taskDialog.DetailsExpandedText = "Test";
taskDialog.DetailsCollapsedLabel = "Expand";
taskDialog.StandardButtons = TaskDialogStandardButtons.Ok;
taskDialog.Icon = TaskDialogStandardIcon.Error;
taskDialog.Show();

我使用的是 1.1 版本here。 知道它们为何缺失以及如何启用它们吗？依赖关系设置如下：

  <dependency>
    <dependentAssembly>
      <assemblyIdentity
      type="win32"
      name="Microsoft.Windows.Common-Controls"
      version="6.0.0.0"
      processorArchitecture="*"
      publicKeyToken="6595b64144ccf1df"
      language="*"
/>
    </dependentAssembly>
  </dependency>

我已经找到了解决此问题的方法。显然这是 API 本身的一个错误。

taskDialog.Opened += new EventHandler(taskDialog_Opened);

...

public void taskDialog_Opened(object sender, EventArgs e)
{
    TaskDialog taskDialog = sender as TaskDialog;
    taskDialog.Icon = taskDialog.Icon;
    taskDialog.FooterIcon = taskDialog.FooterIcon;
    taskDialog.InstructionText = taskDialog.InstructionText;
}