C# 如何把两个UserInfo类 对象加到 List <> 中

public class UserInfo
{
private string _username;
private string _userpwd;

public string UserName
{
get { return _username; }
set { _username = value; }
}

public string UserPwd
{
get { return _userpwd; }
set { _userpwd = value; }
}
}

public class BUserInfo
{
public List GetAll()
{
List list = new List();
list.Clear();
UserInfo userinfo = new UserInfo();
userinfo.UserName = "css";
userinfo.UserPwd = "css";
//add1
userinfo.UserName = "admin";
userinfo.UserPwd = "admin";
//add2
list.Add(userinfo);
return list;
}
}

这样应该可以吧，因为List是一个集合，两条信息都会存在这个集合中吧

List list = new List();
list.Clear();
UserInfo userinfo = new UserInfo();
userinfo.UserName = "css";
userinfo.UserPwd = "css";
list.add(userinfo );
userinfo = new UserInfo();
userinfo.UserName = "admin";
userinfo.UserPwd = "admin";
list.add(userinfo );
return list;

public class BUserInfo
{
public List GetAll()
{
List list = new List();
list.Clear();
UserInfo userinfo = new UserInfo();
userinfo.UserName = "css";
userinfo.UserPwd = "css";
//add1
list.add(userinfo);
UserInfo userinfo = new UserInfo();
userinfo.UserName = "admin";
userinfo.UserPwd = "admin";
//add2
list.add(userinfo);
return list;
}
}