private void butt3_Click(object sender, RoutedEventArgs e)
{
var selectItem = (Student)lstbox.SelectedValue;
EditStudent subWindow = new EditStudent(selectItem);
subWindow.Owner = this;
subWindow.Show();
}
private void butt1_Click(object sender, RoutedEventArgs e)
{
EditStudent subWindow = new EditStudent();
subWindow.Owner = this;
subWindow.Show();
//using (var db = new ProjectDbContext())
//{
// Student item = new Student { Name = "Evgenii", Dni = "123" };
// db.Students.Add(item);
// db.SaveChanges();
// lstbox.ItemsSource = db.Students.ToList();
//}
}