New to C#. I am trying this code, which I copied from w3school User Input using System; namespace Sample { class Test { public stat ...

How to indicate to static null flow analysis in C# that a property from a method's return object is not null because it has been validated? See the co ...

A very simple example but often you have private class fields or properties set during construction, and want to pull this out into helper methods: ...

Short Version How to make the C# nullable type checking compiler realize that the variable customer cannot be null after the call returns: .NET Fi ...

With how the virtual keyword interacts with EPiServer CMS's implementation of EntityFramework, where empty properties will be read as null, is there a ...

The extension method GetOrCreateAsync for IMemoryCache: public static async Task<TItem?> GetOrCreateAsync<TItem>(this IMemoryCache cache, ...

I need to do a checker to ensure that all parameters have been well implemented. But I am not able to differentiate if a string variable was used unne ...

I have a function like this: So, if I don't catch any exception, “info" shouldn't be null. But how can I remove the "?"? ...

There's a question from a few years back How to WhenAll when some tasks can be null? which has a fairly simple top-rated answer: But in modern .Net ...

Why do I get a Warning in the line of list2? I filtered out all null values here. The warning states, that in the select method a null value might be ...

When using DataAnnotations to validate models for incoming controller requests, non-nullable reference types are implicitly treated as required unless ...

The documentation for nullable reference types says: The compiler uses those annotations to help you find potential null reference errors in your ...

I have this generic method for throwing different exceptions with a different T depending on the context: The Activator.CreateInstance() returns a ...

What is the difference between a nullable string (string?) and a string initiated to a forgiven null (string s = null!) Are there any situations wh ...

I am working through a training class for ASP.NET Core 6 and in it, in a class declaration, it has: If I understand the default! correctly (I'm exp ...

I'm a little bit confused about the "is" operator, using VS2022 and Resharper after writing this: As Resharper suggest, changing is not int id to i ...

I am writing some functions like this in C# along the lines of int.TryParse: My issue is I can't find a elegant way around this, you can write an a ...

I created a new C#10/.net6 library project in VS2022 using the standard template, NRTs are enabled by default (nullable : enabled). I notice that null ...

I am cleaning all null reference warnings from my C# code and have a warning when calling Win32 API methods. Per the method documentation I can pass ...

I'm getting these warnings with the code below: CS8601 - Possible null reference assignment. CS8604 - Possible null reference argument for parameter ...