AvaloniaKnuScool/Models/Course.cs

using System;
using System.Collections.Generic;

namespace AvaloniaApplication1.Models;

public partial class Course
{
    public int Id { get; set; }

    public string? Course1 { get; set; }

    public virtual ICollection<TeachersCourse> TeachersCourses { get; set; } = new List<TeachersCourse>();
}