public void RefreshRolesComboBox() { var allCount = 0; foreach (var role in (Role[])Enum.GetValues(typeof(Role))) { if (_employeesRepository.CountOfEmployees(_selectedProject, role) > 0) { rolesComboBox.Items.Add($"{role} ({_employeesRepository.CountOfEmployees(_selectedProject, role)})"); allCount += _employeesRepository.CountOfEmployees(_selectedProject, role); } } rolesComboBox.Items.Add($"All ({allCount})"); rolesComboBox.Text = $@"All ({allCount})"; }