ToString formatted output incorrect on net5.0

[KevinRansom]

This code:

            Console.WriteLine("{0}", 30000.ToString("N", new CultureInfo("de-DE")));

Produces different output when compiled netcoreapp3.1 and net5.0, note: 3 decimal places in net5.0 and 2 decimal places in netcoreapp3.1
Net5.0

30.000,000

netcoreapp3.1

30.000,00

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Issue Details

---

This code:

            Console.WriteLine("{0}", 30000.ToString("N", new CultureInfo("de-DE")));

Produces different output when compiled netcoreapp3.1 and net5.0, note: 3 decimal places in net5.0 and 2 decimal places in netcoreapp3.1
Net5.0

30.000,000

netcoreapp3.1

30.000,00

Author:	KevinRansom
Assignees:	-
Labels:	area-System.Numerics, untriaged
Milestone:	-

[tannergooding]

I'm fairly certain this is by design and due to standardizing on ICU

CC. @tarekgh, @GrabYourPitchforks

[tannergooding]

See also #44587

[KevinRansom]

@tannergooding , thanks for the info I will update our tests accordingly.