Comment by Genbox | Hacker News Reader

Comment by Genbox | Hacker News Reader

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That is not true.

LINQ's First() correctly returns a non-nullable type: https://source.dot.net/#System.Linq/System/Linq/First.cs,11

FirstOrDefault() correctly returns a nullable type: https://source.dot.net/#System.Linq/System/Linq/First.cs,33

typeof(type).Name is MemberInfo.Name, which is also not nullable: https://source.dot.net/#System.Private.CoreLib/MemberInfo.cs...

I checked both .NET 5 and .NET 6. They have identical nullability.

Then how come I get a compiler error if I don't check the result?

Did you perhaps enable null checking for an older version of the framework (in which the standard assemblies don't have the appropriate annotations)? This works just fine when targeting .NET 6:

   object[] xs = {};
   var n = xs.First();
   n.ToString();

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