拆分字符串列表以忽略 c# 中已拆分的值

Question

我需要在 cn= ex.Group Policy,Users,Administrators,Enterprise Admins 之后的值相等的基础上拆分下面的列表连接，该列表包含在 c# 中低于预期值的唯一值

     [0]  "cn=Group Policy,cn=Users,dc=ldapdomain,dc=domain"
     [1]  "cn=Administors,cn=Users,dc=ldapdomain,dc=domain"
     [2]  "cn=Enterprise Admins,cn=LogUsers,dc=ldapdomain,dc=domain"

我的预期场景是得到一个值低于的列表

cn[0]="Group Policy";
cn[1]="Users";
cn[2]="Administrators";
cn[3]="Enterprise Admins";
cn[4]="LogUsers";

I am trying with below code but not finding a way to split cn= 

List<string> connection = new List<string>();
            List<string> groups = new List<string>();
            groups.Add("cn=Group Policy,cn=Users,dc=ldapdomain,dc=domain");
            groups.Add("cn=Administors,cn=Users,dc=ldapdomain,dc=domain");
            groups.Add("cn=Enterprise Admins,cn=LogUsers,dc=ldapdomain,dc=domain");
            foreach(var group in groups)
            {
                group.Split("cn=");
            }

Answer 1

var list = groups
    .SelectMany(g => g.Split(','))    // split each into an array and select each item
    .Where(cn => cn.StartsWith("cn=", StringComparison.OrdinalIgnoreCase))
    .Select(cn => cn.Substring(3))    // cut off the first 3 characters
    .Distinct(StringComparison.OrdinalIgnoreCase)    // only distinct items
    .ToArray();