text file read all lines c# code example

Example 1: c sharp how to read a text file

// To save the text as one string use 'ReadAllText()'
string text = System.IO.File.ReadAllText(@"C:\filepath\file.txt");
// To save each line seperately in an array use 'ReadAllLines()'
string[] lines = System.IO.File.ReadAllLines(@"C:\filepath\file.txt");

Example 2: text file read all lines c#

using System;
using System.IO;
class Test
{
    public static void Main()
    {
        string path = @"c:\temp\MyTest.txt";

        // This text is added only once to the file.
        if (!File.Exists(path))
        {
            // Create a file to write to.
            string[] createText = { "Hello", "And", "Welcome" };
            File.WriteAllLines(path, createText);
        }

        // This text is always added, making the file longer over time
        // if it is not deleted.
        string appendText = "This is extra text" + Environment.NewLine;
        File.AppendAllText(path, appendText);

        // Open the file to read from.
        string[] readText = File.ReadAllLines(path);
        foreach (string s in readText)
        {
            Console.WriteLine(s);
        }
    }
}