using System;
using System.IO;
class Test
{
public static void Main()
{
string path = @"c:\temp\MyTest.txt";
if (!File.Exists(path))
{
string[] createText = { "B", "A", "c" };
File.WriteAllLines(path, createText);
}
string appendText = "This is extra text" + Environment.NewLine;
File.AppendAllText(path, appendText);
string[] readText = File.ReadAllLines(path);
foreach (string s in readText)
{
Console.WriteLine(s);
}
}
}