按字母顺序排序身份+ c＃

Question

我正在处理以下代码片段，其中m_identities [memDesc] .DisplayName是Windows SID DisplayName。显示名称采用LastName，FirstName格式。我需要帮助搞清楚一些事情，

1. 切换m_identities [memDesc] .DisplayName格式，使其格式为FirstName LastName
2. 将DisplayName导出为CSV时，按字母顺序对DisplayName进行排序。

非常感谢任何帮助！

static void Write(TeamFoundationIdentity group)
{
    string csv = string.Format("\n Members of group: {0} \n ", group.DisplayName);
    File.AppendAllText(@"C:\MembersLog\QueryMembers" + ".csv", csv);
    string csv1 = string.Format("==================================================\n");
    File.AppendAllText(@"C:\MembersLog\QueryMembers" + ".csv", csv1);

    foreach (IdentityDescriptor memDesc in group.Members)
    {
        string csv2 = string.Format(" {0} \n", m_identities[memDesc].DisplayName);
        File.AppendAllText(@"C:\MembersLog\QueryMembers" + ".csv", csv2);
    }

    Console.WriteLine();
}