private void EditDepartment(DepartmentDto departmentDto)
        {
            Department department = _repository.GetById(departmentDto.Id);
            var viewModel = new DepartmentViewModel(department);

            if (_dialogService.ShowDialog(viewModel) == true)
            {
                int index = Departments.IndexOf(departmentDto);
                Departments[index] = _repository.GetDepartmentDto(viewModel.Department.Id);
            }
        }
 private void DeleteDepartment(DepartmentDto departmentDto)
 {
     _repository.Delete(departmentDto.Id);
     Departments.Remove(departmentDto);
 }