implementing Asynchronous File I/O in C# - advanced patterns with FileStream and Await
I'm trying to debug I'm working with unexpected behavior when using asynchronous file I/O with `FileStream` in .NET 6.0. Specifically, I expect my method to wait for the file read operation to complete before proceeding, but it seems that the read operation is not being awaited properly. Here’s a simplified version of my code: ```csharp public async Task<string> ReadFileAsync(string filePath) { using (var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, true)) { using (var reader = new StreamReader(fileStream)) { return await reader.ReadToEndAsync(); } } } ``` I call this method from an ASP.NET Core controller action: ```csharp public async Task<IActionResult> GetFileContent(string filePath) { var content = await ReadFileAsync(filePath); return Content(content); } ``` However, when I hit the endpoint, I occasionally get an `ObjectDisposedException`, indicating that the `StreamReader` has been disposed before the read operation completes. This happens intermittently, and I need to pin down the exact cause. I've tried adding explicit `await` in various places, but it doesn’t seem to help. The application is set up for concurrency, and it feels like the `StreamReader` is being disposed of while the task is still running. I ensured that `ReadFileAsync` is awaited correctly in the controller, and I also checked that the file exists and is accessible. Is there something specific about asynchronous file operations or the use of `FileStream` that I might be overlooking? Should I consider using different parameters for the `FileStream` constructor? Any help would be appreciated! Has anyone dealt with something similar?