当前上下文中不存在上下文（Android 项目）

Question

我对 Xamarin 还很陌生，正在尝试 Xamarin 开发人员网站上的不同教程。我正在测试 Android 的通知代码并收到 "Context does not exist in the current context" 错误。我将以下代码放在 MainActivity.cs 中。我该如何解决这个问题？

Notification.Builder builder = new Notification.Builder (this)
.SetContentTitle ("Sample Notification")
.SetContentText ("Hello World! This is my first notification!")
.SetSmallIcon (Resource.Drawable.ic_notification);

// Build the notification:
Notification notification = builder.Build();

// Get the notification manager:
NotificationManager notificationManager =
GetSystemService (Context.NotificationService) as NotificationManager;

// Publish the notification:
const int notificationId = 0;
notificationManager.Notify (notificationId, notification);

Answer 1

原来我不需要上下文来访问NotificationService。我认为这是因为我已经在上下文中了。

当前上下文中不存在上下文（Android 项目）

Context does not exist in current context (Android Project)

xamarin.android

xamarin