Question

I have the following method that is triggered when an exception occurs in a part of my Metro application

void Model_ExceptionOccured(Exception ex)
{
    var dlg = new Windows.UI.Popups.MessageDialog("An exception occured during verification: " + ex.Message, "Exception");
    dlg.ShowAsync();
}

The ‘dlg.ShowAsync()’-call is asynchronous, but I don’t care to wait for the result. The compiler generates a warning for it though:

Because this call is not awaited, execution of the current method continues before the call is completed. Consider applying the 'await' operator to the result of the call.

Should I care? Is there any reason I should add the await keyword, other than to get rid of the warning?

Answer 1

According to the below link, the answer given by alexm is not correct. Exceptions thrown during an async call that is not awaited will be lost. To get rid of this warning, you should assign the Task return value of the async call to a variable. This ensures you have access to any exceptions thrown, which will be indicated in the return value.

http://msdn.microsoft.com/en-us/library/hh965065(v=vs.110).aspx (VB.NET)

http://msdn.microsoft.com/en-us/library/hh873131.aspx (C#)