Using Visual Studio 2015, I selected File–New–Project–Visual C#–Console Application, and began testing text file creation, writing and reading, loading items from the text file into an array, and returning specific elements from the array.
using System; using System.IO; class Test { public static void Main() { string path = @"c:\CSharpLabs\computers.txt"; // See if file exists, if not exists, create file if (!File.Exists(path)) { // Create a file to write to. string[] createText = { "computer1", "computer2", "computer3" }; File.WriteAllLines(path, createText); } // Append to last line string appendText = "computer99" + Environment.NewLine; File.AppendAllText(path, appendText); // Read each line string[] readText = File.ReadAllLines(path); foreach (string s in readText) { //output to screen Console.WriteLine(s); } //select a couple of array items to output Console.WriteLine("Array 1 is: {0}", readText[0]); Console.WriteLine("Array 2 is: {0}", readText[1]); Console.ReadLine(); } }