将C＃事件相关代码转换为VB.Net

Question

我正在尝试将此C＃代码翻译为VB.Net

public event EventHandler<OnBackgroundEnteringEventArgs> OnBackgroundEntering;

public async Task SaveStateAsync()
{
    var suspensionState = new SuspensionState()
    {
        SuspensionDate = DateTime.Now
    };

    var target = OnBackgroundEntering?.Target.GetType();
    var onBackgroundEnteringArgs = new OnBackgroundEnteringEventArgs(suspensionState, target);

    OnBackgroundEntering?.Invoke(this, onBackgroundEnteringArgs);

    await ApplicationData.Current.LocalFolder.SaveAsync(stateFilename, onBackgroundEnteringArgs);
}

此代码是Windows Template Studio的一部分。原始文件可在此处找到：SuspendAndResumeService.cs

VB.Net中的翻译代码：

Public Event OnBackgroundEntering As EventHandler(Of OnBackgroundEnteringEventArgs)

Public Async Function SaveStateAsync() As Task
    Dim suspensionState As New SuspensionState With {.SuspensionDate = DateTime.Now}
    Dim target = OnBackgroundEntering?.Target.GetType()
    Dim onBackgroundEnteringArgs = New OnBackgroundEnteringEventArgs(suspensionState, target)

    RaiseEvent OnBackgroundEntering(Me, onBackgroundEnteringArgs)

    Await ApplicationData.Current.LocalFolder.SaveAsync(stateFilename, onBackgroundEnteringArgs)
End Function

我对这部分有疑问：

Dim target = OnBackgroundEntering?.Target.GetType()

Intellisense显示以下错误：

  

错误BC32022'公共事件OnBackgroundEntering As EventHandler（Of   OnBackgroundEnteringEventArgs）'是一个事件，无法调用   直。使用'RaiseEvent'语句来引发事件。

如果有人能帮助我，我将不胜感激。感谢。