Strange Behavior with C# 10 Local Functions in Asynchronous Contexts Not Returning Expected Values
I'm relatively new to this, so bear with me. After trying multiple solutions online, I still can't figure this out. I'm working with an unexpected behavior with local functions in C# 10 when they're used in an asynchronous context. I have a local function defined inside an asynchronous method, and I'm noticing that it sometimes returns `null` when it should return a value. Here's a simplified version of my code: ```csharp public class Example { public async Task<string> ProcessDataAsync(string input) { // Local function to transform input string TransformInput(string data) { return data.ToUpper(); } // Simulate async operation await Task.Delay(100); // Calling local function return TransformInput(input); } } ``` When I call this method like so: ```csharp var example = new Example(); var result = await example.ProcessDataAsync("test"); Console.WriteLine(result); ``` Sometimes `result` prints `TEST`, but occasionally it prints `null`. There's no clear pattern as to why this is happening; it seems to be intermittent. I’ve tried adding null checks and debugging, but the local function seems to behave inconsistently. I also attempted to refactor the local function into a separate method, and that seemed to resolve the scenario, but I’d like to understand why the local function is causing this behavior. Is there something specific about the scope of local functions in asynchronous methods that I might be missing? Any insights into what could be causing this, or how I can avoid such issues would be greatly appreciated! This is part of a larger service I'm building. For context: I'm using C# on Linux. How would you solve this? Any pointers in the right direction? I'd be grateful for any help. What am I doing wrong?