NullReferenceException "Remarks" example doesn't build in .NET 6

https://docs.microsoft.com/en-us/dotnet/api/system.nullreferenceexception?view=net-6.0#remarks

The first code block which is supposed to give warning BC42104 instead gives error CS0165
```using System;
using System.Collections.Generic;

public class Example
{
public static void Main(string[] args)
{
int value = Int32.Parse(args[0]);
List names;
if (value > 0)
names = new List();

names.Add("Major Major Major");
}
}