Question

I need to create/append a text file and write some data in that. When I write the below code to my ASP.NET application, it gives the error that file is being used by another process.

if (!File.Exists(path\file))
    File.CreateText(path\file);
using(StreamWriter sw = File.AppendText(Server.MapPath(path\file)))
{
    sw.WriteLine("Text Data");
    sw.Close();
}

Answer 1

You have to create a file like that in the code below and close the file after creating it..

if (!File.Exists(""))
{            
    StreamWriter sr =  File.CreateText("");
    sr.Close();
}

Take a look at this example from MSDN.
This will show you to how you can create a text file.

OR, you can create a text file in this way; The code below is from MSDN

if (!File.Exists(path)) 
{
    // Create a file to write to.
    using (StreamWriter sw = File.CreateText(path)) 
    {

    }   
}