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implementing Asynchronous File Reading in C# - FileNotFoundException Even When Path is Correct

πŸ‘€ Views: 32 πŸ’¬ Answers: 1 πŸ“… Created: 2025-07-02
async file-io dotnet-6 C#

I'm upgrading from an older version and I tried several approaches but none seem to work... After trying multiple solutions online, I still can't figure this out. Quick question that's been bugging me - Hey everyone, I'm running into an issue that's driving me crazy..... I'm experiencing a frustrating scenario when trying to read a file asynchronously in my C# application. I'm using .NET 6 and the `System.IO` namespace. My method to read the file is defined as follows: ```csharp public async Task<string> ReadFileAsync(string filePath) { using (var reader = new StreamReader(filePath)) { return await reader.ReadToEndAsync(); } } ``` However, when I call this method with a correct file path, I get a `FileNotFoundException` stating that the file does not exist, even though I can confirm that the file is indeed present at the specified location. Here’s how I’m calling the method: ```csharp string filePath = "C:\path\to\your\file.txt"; string content = await ReadFileAsync(filePath); ``` I've verified that the path is correct and that I have the necessary permissions to access the file. I've also tried using `File.Exists(filePath)` before attempting to read the file, and it returns true. I even tested the code in a simple console application to rule out other factors, but I still encounter the same scenario. Could this be related to how the file is accessed in an async context, or am I possibly missing something in my project configuration? Any insights or suggestions on what might be going wrong would be greatly appreciated! I'm working on a web app that needs to handle this. My development environment is Windows. I appreciate any insights! This is happening in both development and production on Ubuntu 20.04. Thanks for taking the time to read this! My development environment is Linux. I'm open to any suggestions.