public event EventHandler <MyEventArgs> MyEvent;//要执行的事件
private Task RaiseMyEventAsync()
{
var handler = MyEvent;
if (handler == null)
{
return(Task.FromResult(0));
}
var args = new MyEventArgs();
handler(this, args);
return(args.WaitForDeferralsAsync());
}
private async Task RaiseMyEventAsync()
{
EventHandler <MyEventArgs> handler = MyEvent;
if (handler == null)
{
return;
}
var args = new MyEventArgs();
handler(this, args);
await args.WaitForDeferralsAsync();
}