.NET methods that we want to switch to once they become available in .NET Core #3235

Some .NET APIs are missing in .NET Core, and thus we had our own implementation based on the full .NET source code. For those methods, we should switch to the official APIs once they become available in .NET Core.

Instances: (not a complete list)
ClrFacade.ToBase64StringWithLineBreaks(byte[]) --> System.Convert.ToBase64String(byte[] inArray, Base64FormattingOptions options)

Feel free to update this list when you spot one.