Confusion with Async/Await and Task Completion in C# - Unexpected Deadlock in WinForms Application
I'm working with a frustrating deadlock situation in my WinForms application when using async/await. The scenario arises when I try to call an asynchronous method from a button click event. Here's a simplified version of what I'm doing: ```csharp private async void btnFetchData_Click(object sender, EventArgs e) { var data = await FetchDataAsync(); MessageBox.Show(data); } private async Task<string> FetchDataAsync() { await Task.Delay(2000); // Simulating a long-running task return "Data fetched!"; } ``` Despite using `async void` for the event handler, the UI freezes when I click the button, and I suspect it’s because I'm waiting for `FetchDataAsync` to complete on the UI thread. I’ve tried changing the method signature to `async Task` and using `await` in a different context, but that didn't help. Additionally, I noticed that if I run this in a console application instead, everything works fine. I believe it might have something to do with the synchronization context in WinForms. The exception message I'm seeing occasionally is `System.Threading.Tasks.TaskCanceledException`, and I need to pinpoint where the cancellation is happening. How can I resolve this deadlock and ensure that my UI remains responsive while waiting for the async task to complete?