System.UnauthorizedAccessException while creating a file

Question

I was trying to write a code so that I could log the error messages. I am trying to name the file with the date and would like to create a new log file for each day. After g

Answer 1

Your path is strange : "My documents" directory must be "C:\Users\MyName\Documents\"

You can use Environment in order to correct it easily :

String myDocumentPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);

Note that it will acces to "My documents" folder of the user that running your exe.

Second error, CreateDirectory must have a path in argument, not a file. using like you do will create a sub-directory with the file name. So you can't create a file with this name !

Try this :

String fileName = DateTime.Now.ToString("d", DateTimeFormatInfo.InvariantInfo);

String filePath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments)
    + @"\visual studio 2012\projects\training\discussionboard\ErrorLog\";
String fileFullName = filePath + fileName + ".txt";

    if (File.Exists(fileFullName ))
    {
        File.WriteAllText(fileFullName , error);
    }
    else
    {
        Directory.CreateDirectory(filePath);

[...]
    }
}