CSHARP

c# read file by line

using (var file = new StreamReader(fileName)) {
	string line;
	while((line = file.ReadLine()) != null)  
	{  
		System.Console.WriteLine(line);
	}  
}

c# read file line by line

using System;
using System.IO;
 
public class Example
{
    public static void Main()
    {
        string fileName = @"C:examplepath.txt";
 
        using (StreamReader streamReader = File.OpenText(fileName))
        {
            string text = streamReader.ReadToEnd();
            string[] lines = text.Split(Environment.NewLine);
 
            foreach (string line in lines) {
                Console.WriteLine(line);
            }
        }
    }
}

read all lines from txt c#

string[] lines_in_file = File.ReadAllLines(@"C:myfilepathfile.txt");

c# read all lines from filestream

public IEnumerable<string> ReadLines(Func<Stream> streamProvider,
                                     Encoding encoding)
{
    using (var stream = streamProvider())
    using (var reader = new StreamReader(stream, encoding))
    {
        string line;
        while ((line = reader.ReadLine()) != null)
        {
            yield return line;
        }
    }
}