PortablePrism.Portable by Andrii Chebukin

<PackageReference Include="PortablePrism.Portable" Version="1.0.1" />

 NavigationMode

public enum NavigationMode
Specifies the navigation stack characteristics of a navigation.
Back = 1

Navigation is going backward in the stack.

Forward = 2

Navigation is going forward in the stack.

New = 0

Navigation is to a new instance of a page (not going forward or backward in the stack).

Refresh = 3

Navigation is to the current page (perhaps with different data).