The process cannot access the file because it is being used by another process (File is created but contains nothing)

Question

using System.IO;

class test
{
    public static void Main()
    {

        string path=@"c:\mytext.txt";

        if(File.Exists(path))
        {
            File.Delete(path);
        }


        FileStream fs=new FileStream(path,FileMode.OpenOrCreate);
        StreamWriter str=new StreamWriter(fs);
        str.BaseStream.Seek(0,SeekOrigin.End); 
        str.Write("mytext.txt.........................");
        str.WriteLine(DateTime.Now.ToLongTimeString()+" "+DateTime.Now.ToLongDateString());
        string addtext="this line is added"+Environment.NewLine;
        File.AppendAllText(path,addtext);  //Exception occurrs ??????????
        string readtext=File.ReadAllText(path);
        Console.WriteLine(readtext);
        str.Flush();
        str.Close();

        Console.ReadKey();
  //System.IO.IOException: The process cannot access the file 'c:\mytext.txt' because it is //being used by another process.
  // at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)

    }
}

user_8411702 · Answer

using (var fs = new FileStream(filePath, FileMode.Append, FileAccess.Write, FileShare.ReadWrite))
using (var sw = new StreamWriter(fs))
{
    sw.WriteLine(message);
}

The process cannot access the file because it is being used by another process (File is created but contains nothing)

4 Answers