Swapping ContentPresenter Content for different Screens

[nerdkl]

if i go from menu to new game screen where i can pick seed generator etc..
its working fine. if i try to go back to menu (cancel) or to game (apply) it throws an exception:
"seed property not found". i have even tried to implement on seed property on menu screen, but same result.

  public GameViewModel CurrentScreen
    {
        get => currentscreen;
        private set => SetProperty(ref currentscreen, value, nameof(CurrentScreen));
    }

[EmptyKeys]

Hi, I would have to see some working example with that issue.

[nerdkl]

issueexamples.zip

if i clear both textbox´s its not happening :) ?
u can choose between start und extensions