wabbajack/Wabbajack.App/Views/ViewBase.cs

using System;
using Avalonia.ReactiveUI;
using Microsoft.Extensions.DependencyInjection;
using Wabbajack.App.ViewModels;

namespace Wabbajack.App.Views;

public abstract class ViewBase<T> : ReactiveUserControl<T>
    where T : ViewModelBase
{
    public ViewBase(bool createViewModel = true)
    {
        if (createViewModel)
        {
            ViewModel = App.Services.GetService<T>();
            if (ViewModel == null)
                throw new Exception($"View model {typeof(T)} not found, did you forget to add it to DI?");
        }
    }
}