Need streamreader to read content of multiple files

[RogueX20]

I can get streamreader to work on one file, but can't code right to get it to read multiple.

The first code is where I have it working fine. The second one just produces a dos window with no date.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace readtest
{
    class Program
    {
        static void Main(string[] args)
        {
           
           
            StreamReader sr = new StreamReader("C:\\Users\Random.txt");
                string str = sr.ReadLine();
                
                string[] words = str.Split('|');
                foreach (string word in words)
                {
                    Console.WriteLine(word);
                } Console.ReadKey();
            }
        }
    }

This is the one I can't figure out what is wrong. No errors being produced, but not getting the result I want either.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] files = Directory.GetFiles("C:\\Users", ".txt");
            foreach (string file in files)
            {
                StreamReader sr = new StreamReader(file);
                string str = sr.ReadLine();

                    {
                        Console.WriteLine(file);
                    }
                } Console.ReadKey();

            }
        }
    }