ClientApiPoC/Shared.Wpf/MvvmWindow.cs

using System.Windows;

namespace ClientApiPoC.Shared.Wpf {
    public abstract class MvvmWindow<TViewModel> : Window where TViewModel : BaseViewModel {
        protected TViewModel ViewModel { get; }

        public MvvmWindow(TViewModel viewModel) : base() {
            if (viewModel == null) throw new ArgumentNullException(nameof(viewModel));
            this.ViewModel = viewModel;
            this.DataContext = this.ViewModel;
        }
    }
}