app.cs

using System;
using System.IO;

class App {
    public static void Main (string[] args)
    {
        foreach (var file in args) {
            var content = File.ReadAllText (file);
            var lines = content.Split ('\n');
            foreach (var line in lines) {
                Console.WriteLine ($"'{line}' {line.Length}");
            }
        }
    }
}

C:\Users\jopryo\tmp>.\endline.exe endline.cs
' 14ng System;
' 17ng System.IO;
' 1
' 12ss App {
' 44 public static void Main (string[] args)
' 6  {
' 37     foreach (var file in args) {
' 51         var content = File.ReadAllText (file);
' 46         var lines = content.Split ('\n');
' 42         foreach (var line in lines) {
' 63             Console.WriteLine ($"'{line}' {line.Length}");
' 14         }
' 10     }
' 6  }
'}' 1