example for making reading line as Enumerable

ReadFrom.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Threading.Tasks;
using System.IO;

namespace JuestForCshap
{
    class Program
    {
        static IEnumerable<string> ReadFrom(string file)
        {
            using (var reader = File.OpenText(file))
                for(string line; (line = reader.ReadLine()) != null;/* */)
                    yield return line;
        }

        static void Main(string[] args)
        {
            foreach (string line in ReadFrom(@"d:\test_enrol.csv"))
                Console.WriteLine(line);
        }
    }
}