Removes .NET Core incompatible encoding (see https://docs.microsoft.com/de-de/dotnet/api/system.text.encoding?view=netcore-2.0#Remarks ).
Removes .NET Core incompatible encoding (see https://docs.microsoft.com/de-de/dotnet/api/system.text.encoding?view=netcore-2.0#Remarks ).

fsprojects/FSharpx.Extras,fsprojects/FSharpx.Extras