Log Data to a File - CSharp File IO

CSharp examples for File IO:Text File

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Description

Log Data to a File

Demo Code


using System;//from w  w w .j a  va2s  .  c om
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

class MainClass
    {
        static void Main(string[] args)
        {
            List<string> myList = new List<string>();
            myList.Add("Log entry 1");
            myList.Add("Log entry 2");
            myList.Add("Log entry 3");
            myList.Add("Error entry 1");
            myList.Add("Error entry 2");
            myList.Add("Error entry 3");

            File.WriteAllLines("all_entries.log", myList);

            File.WriteAllLines("only_errors.log",myList.Where(e => e.StartsWith("Error")));
        }
    }

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