👀 Views: 0 💬 Answers: 1 📅 Created: 2025-06-12

c# linq nullable-types C#

I recently switched to I'm collaborating on a project where After trying multiple solutions online, I still can't figure this out... I'm working with a question with nullable reference types in C# 11 when using LINQ queries. I have the following setup in my application, which targets .NET 7. I'm trying to filter out a list of users to find those who have a non-null email address, but the compiler keeps throwing warnings about possible null dereference. Here’s a snippet of the code: ```csharp public class User { public string? Email { get; set; } } public List<User> GetUsersWithEmails(List<User> users) { return users.Where(user => user.Email != null).ToList(); } ``` Although I believe this should work since I'm checking for null explicitly, I'm still getting this warning: ``` CS8602: Dereference of a possibly null reference. ``` I thought that by checking `user.Email != null`, it would guarantee that `user.Email` is safe to access afterwards, but the compiler seems to think otherwise. I've tried enabling nullable reference types in my project settings, and it is set to `enable`, but the scenario continues. Additionally, I attempted to use the null-forgiving operator `!`, like this: ```csharp return users.Where(user => user.Email != null).Select(user => user.Email!).ToList(); ``` But that just silenced the warning without actually resolving the underlying question. Is there a specific way to handle this situation with LINQ and nullable reference types to make the compiler understand that `Email` is indeed safe to access? Is there a best practice I am missing here? My development environment is Linux. I'm developing on Windows 11 with C#. Could this be a known issue? For reference, this is a production desktop app. What am I doing wrong?