using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var files = new List<FileDto>();

        var dict = new Dictionary<int, string>();

        dict.Add(1, "file1");

        dict.Add(2, "file2");

        var enumerator = dict.GetEnumerator();

        int i = 0; 

        while(enumerator.MoveNext())

        {

            Console.WriteLine(enumerator.Current.Value);

            files[i].CorrelationId = enumerator.Current.Key;

        }

        /////////////

        var arr = new Attachment[2];

        arr[0] = new Attachment (1, "file1");

        arr[1] = new Attachment (2, "file2");

        for(int j = 0; j < arr.Length; j++)

        {

            files[i].CorrelationId = arr[i].Id;

        }

    }

    public class FileDto

    {

        public string Name { get; set; }

​

        public string FileExchangeKey { get; set; }

​

        public string FileType { get; set; }

​

        public int CorrelationId { get; set; }

​

        public FileDto(string name, string fileExchangeKey, string fileType)

        {

            Name = name;

            FileExchangeKey = fileExchangeKey;

            FileType = fileType;

        }

    }

    public class Attachment

    {

        public int Id {get; set;}

          public string Name { get; set; }

        public Attachment(int id, string name)

        {

            Id = id;

            Name = name;

        }

    }

}