问在iOS上。当应用程序被发送到后台时，该应用程序是仍在相同的UI线程上运行，还是被移动到新的不同线程

EN

switch (UIApplication.SharedApplication.ApplicationState)
{
    case UIApplicationState.Background:
        Console.WriteLine($"Background location update {NSThread.Current}");
        break;
    case UIApplicationState.Active:
        Console.WriteLine($"Foreground location update {NSThread.Current}");
        break;
}

Location[16904:1947553] Foreground location update <NSThread: 0x60000006d900>{number = 1, name = main}
Location[16904:1947553] Foreground location update <NSThread: 0x60000006d900>{number = 1, name = main}
Location[16904:1947553] Foreground location update <NSThread: 0x60000006d900>{number = 1, name = main}
Location[16904:1947553] App entering background state.
Location[16904:1947553] Now receiving location updates in the background
Location[16904:1947553] Background location update <NSThread: 0x60000006d900>{number = 1, name = main}
Location[16904:1947553] Background location update <NSThread: 0x60000006d900>{number = 1, name = main}