.NET Core: Behavior on non-Windows machines?

The documentation mentions that "The initial value of this property is derived from the settings in the Region and Language item in Control Panel", but that offers no insight as to what the behavior is on Linux (for example in a cloud environment). Please specify how the defaults are set in those cases.

---
#### Document Details

⚠ *Do not edit this section. It is required for docs.microsoft.com ➟ GitHub issue linking.*

* ID: b32b1186-a31f-1f9a-2d1c-cf0ad9a0d055
* Version Independent ID: 14e4da04-64c3-fc22-0329-4009f3e97ec7
* Content: [NumberFormatInfo.NumberDecimalSeparator Property (System.Globalization)](https://docs.microsoft.com/en-us/dotnet/api/system.globalization.numberformatinfo.numberdecimalseparator?view=netframework-4.7.2#System_Globalization_NumberFormatInfo_NumberDecimalSeparator)
* Content Source: [xml/System.Globalization/NumberFormatInfo.xml](https://github.com/dotnet/dotnet-api-docs/blob/master/xml/System.Globalization/NumberFormatInfo.xml)
* Product: **dotnet-api**
* GitHub Login: @dotnet-bot
* Microsoft Alias: **dotnetcontent**

Leggere xml/System.Globalization/NumberFormatInfo.xml e individuare la voce della proprietà NumberDecimalSeparator. Analizzare il comportamento dell’impostazione predefinita nei sistemi .NET Core non Windows, quindi aggiornare la documentazione per spiegare tali valori predefiniti; l’issue è completato quando il comportamento su Linux e negli ambienti cloud è chiaro per i lettori.

Scritto dal modello di indicizzazione a partire dal testo della issue.