ReactiveUI + WPF: ViewModelViewHost does not stretch inside its parent

Question

I'm trying to get a fresh little reactUI WPF app up and running. However ViewModelViewHost causes me problems. It does not fill the widow but stays at its minimum required measures. (as calculated off of its children) I have this bit of XAML in my MainWindow.xaml: So there is a grid in the MainWindow and the middle part shall be occupied by the ViewModelViewHost hence applying Horizontal and VerticalAlignment. I also tired getting rid of the second grid, but no difference. What actually happens (as seen in Snoop) is: The ViewModelViewHost complies to the stretch setting but its templated part PART_CurrentContentPresentationSite does not comply. It stays at Left + Top. What should I do, how was this intended? Replace the template... BTW. It also seems not to be enough just to set the ViewModel-property in order to have the view binding at the view model. You also have to set the DataContext. JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

Answer 1

You need to use the HorizontalContentAlignment and VerticalContentAlignment and set those to stretch.