using System;
using System.Linq;
using System.Globalization;
using System.Collections.Generic;

public class Test
{
  
	public static void Main()
	{
	    string[] arr1 = { "1155717", "5184305", "2531291", "1676341", "1916805" };
            string[] arr2 = { "1155717", "1440230", "2531291", "8178626", "1916805" };
            string[] arr3 = { "1155717", "5184305", "4025514", "167634" };
            
            string[][] all = new[] { arr1, arr2, arr3 };
            int maxLength = all.Max(arr => arr.Length);
            string separator = ",";
            string defaultValue = "N/A";

            var csvFields = all.Select(arr =>
                Enumerable.Range(0, maxLength)
                          .Select(i => arr.Length <= i ? defaultValue : arr[i]));
           var csv = string.Join(Environment.NewLine,
                csvFields.Select(f => string.Join(separator, f.ToArray())).ToArray());       
            Console.Write(csv);
	}
}