AvaloniaDB/TeacheresAndCourses/ViewModels/MainWindowViewModel.cs

using Avalonia.Controls;
using ReactiveUI;
using TeacheresAndCourses.Models;

namespace TeacheresAndCourses.ViewModels
{
    public class MainWindowViewModel : ViewModelBase
    {

        public static MainWindowViewModel Instance;

        public MainWindowViewModel()
        {
            Instance = this;
        }

        public static _43pSuharevaContext connection = new _43pSuharevaContext();

        UserControl uc = new TeachersPage();

        public UserControl Uc { get => uc; set => this.RaiseAndSetIfChanged(ref uc, value); }
    }
}