Adding a list into a root list

I have set up classes to store data in my code.

using System.Collections.Generic;

public class Email {
    public string User_Email { get; set; }
    public DateTime dateTime { get; set; }

public class Status {
    public string User_Status { get; set; }
    public DateTime dateTime {get; set; }

public class Collection_Detail {
    public string Bank_Name { get; set; }
    public string Acc_Name { get; set; }
    public string Acc_No { get; set; }
    public List<Status> return_Status { get; set; }
    public List<Email> email_Notification { get; set; }

I add data into a List of Emails
List<Email> email = new List<Email>();
email_Notifications.Add(new Email_Notification() {User_Email = 'toSender' , dateTime = '2020/10/10'});

And now, I want to put Email list into 'Collection_Detail'. I tried by using
List <Collection_Detail> details = new List <Collection_Detail> ();
details.add(new Collection_Details() {});

However, I am getting an error.

cannot intialize type with a collection initiaizer because it does not
implement ‘System.Collections.IEnumerable’

  1. Any idea how to put a list(s) into another list as a root list ? or
  2. How do I implement ‘IEnumerable’ into code above ?
  3. I tried to refer this microsoft doc but no luck.


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Method 1

I’m not sure if there’s something I’m missing but this should be as easy as:

// Create the list of email notifications
List<Email> emails = new List<Email>();
emails.Add(new Email_Notification() {User_Email = 'toSender' , dateTime = '2020/10/10'});

// Create the list of collection detail
List <Collection_Detail> details = new List <Collection_Detail> ();
details.Add(new Collection_Detail() 
    email_Notification = emails

There were a number of variable names and class names which did not match in your code. Hopefully I’ve caught all errors in the above example.

The one I’ve not corrected is setting a DateTime instance to a string – that wont work but I assume you already know that and how to fix it.

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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