private void btnEdit_Click(object sender, EventArgs e)
{
if (dgvStudents.SelectedRows.Count == 0)
{
return;
}
var selectedRow = dgvStudents.SelectedRows[0];
Student selectedStudent = _studentList.Find(Convert.ToInt32(selectedRow.Cells[0].Value));
var editForm = new OneStudentForm(OneStudentForm.WorkMode.EditStudent, selectedStudent);
Student newStudent = editForm.ShowDialog();
_studentList.Replace(selectedStudent.StudentId, newStudent);
_studentList.Update();
dgvStudents.DataSource = typeof(List <Student>);
dgvStudents.DataSource = _studentList.Value;
}
