C# 2008 dynamic path

string GetDirectoryPath(string customerNumber, string typeOfDocument)

{

    string staticPath = "D:/app1/test";

    string date = DateTime.Today.ToString("MM-dd-yyyy");

    return String.Format("{0}/{1}/{2}/{3}/", staticPath, date, customerNumber, typeOfDocument);

} 

You can then use System.IO.Directory.CreateDirectory(dirPath) to create it.

If you want to create a file (say scampercat.txt) in that directory, the file path will of course be:

   string filePath = dirPath + "/" + "scampercat.txt";

Suppose you have an array containing three lines that you'd like to write to the file:

   string[] array = {"First line", "Second line", "Third line"};

You can then create the file and write those lines to it with:

   System.IO.File.WriteAllLines(filePath, array);

Alternatively, you can do the same thing with a StreamWriter:

   StreamWriter sw = new StreamWriter(filePath);
   foreach(string line in array) sw.WriteLine(line);
   sw.Close();

If you have an existing file that you'd like to move to the new directory, then you can use the System.IO.File.Move method:

http://msdn.microsoft.com/en-us/library/system.io.file.move.aspx