DotNet Core is basically a console app running on the host os.
On Windows the regional setting affects the CultureInfo.CurrentCulture value in a console app.
using System;
using System.Globalization;
namespace Mosaic
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine(CultureInfo.CurrentCulture);
Console.ReadLine();
}
}
}
This will display en-US
if your regional settings on Windows is set to English US.