TPL Break on unhandled exceptions
async-await, c#, debugging, exception, visual-studio
Solution
When the debugger says "Exception was unhandled by user code", what it means is that an exception has propagated up to the framework. Since an `async Task` method places its exceptions on its returned `Task`, the exception does not propagate to the framework. An exception like this is unobserved.
If you want the debugger to break when exceptions are thrown, then use Debugger -> Exceptions -> Check the "Thrown" box for CLR Exceptions.
If you want to observe the exception, then change from `TaskFactory.StartNew` to `Task.Run` and call `Wait` on the returned `Task`. This will propagate the exception (wrapped in an `AggregateException`) through `Main` and up to the framework.
Problem
I am using `async` `await` as well as `Task.Factory.StartNew` in my application but one thing that i noticed changed is that visual studio is no more breaking when an unhandled exception occured Here is what i mean by `before using await` but after i turn a method into a `Task` and use await It is only captured in the output area in visual studio... BTW : It is very strange for me as i am new to .Net4.5 please excuse me if failed to illustrate what i need specifically but again what i want to know is - How could i make visual studio break on the exceptions when using async await