/*
* Trace:
* On UI thread: BEGINNING of EventHandler
* On UI thread: Beginning of DangerousMethodAsync
*/
private void BLOCKING_UI_CALL_WITH_DEADLOCK(object sender, EventArgs e)
{
Logger.Write("BEGINNING of EventHandler"); // on UI thread
Task.WaitAll(_service.DangerousMethodAsync(), _task2, _task3);
Logger.Write("END of EventHandler"); // on UI thread
}
/*
* Trace:
* On UI thread: Beginning of EventHandlerMethod
* On UI thread: Beginning of DangerousMethodAsync
*
* ---------DEADLOCK---------
*/
private void BLOCKING_OF_UI_THREAD_WITH_DEADLOCK_DUE_TO_ConfigureAwaitTrue_IN_THE_LIBRARY_METHOD(object sender, EventArgs e)
{
Logger.Write("Beginning of EventHandlerMethod"); // on UI thread
_service
.DangerousMethodAsync() // on UI and on ThreadPool threads
.Wait(); // BLOCK UI thread till the end of execution of library method
Logger.Write("End of EventHandlerMethod"); // on UI thread
}
/*
* Trace:
* On UI thread: BEGINNING of EventHandler
* On UI thread: Beginning of GetText
*
* ---------DEADLOCK---------
*/
private void BLOCKING_UI_CALL_WITH_DEADLOCK(object sender, EventArgs e)
{
Logger.Write("BEGINNING of EventHandler"); // on UI thread
var result = _service
.DangerousMethodAsync("https://www.google.com") // on UI and ThreadPool threads
.Result; // BLOCK UI thread till the end of getting result from library method
label1.Text = result; // on UI thread
Logger.Write("END of EventHandler");
}