WriteAllText does not work for VB Console App .Net Core

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**Issue moved from MicrosoftDocs/feedback#3274**
- Please respond to @winf3.

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_From @winf3 on Monday, November 16, 2020 1:28:02 PM_

Problem:
I create a testprogram according to your page
https://docs.microsoft.com/de-de/dotnet/api/microsoft.visualbasic.fileio.filesystem.writealltext?view=net-5.0#-berl-dt

For that purpose I created a project in Visual Studio 2019 based on the Visual Basic, Windows Console App (.NET Core) template
1. Problem: There seems to be no Visual Basic, Windows Console App (.NET Standard) template any more. Why ?

2. Problem: When I add the example lines to the new project, I get the following Error:

Fehler BC30456 "FileSystem" ist kein Member von "Computer". TestFilewrite

**To Reproduce**
Sourcecode:
Imports System

Module Program
Sub Main(args As String())
Console.WriteLine("Hello World!")
My.Computer.FileSystem.WriteAllText("C:\TestFolder1\test.txt", "This is new text to be added.", False)
End Sub
End Module

**Expected behavior**
I would expect, that I can use the WriteAllText function in an VB Console App when it is described in a current tutorial.
I also would expect that I find a description what would be the installation and setup requirements to use this function.