Saving to delimited text file

Question

Hello, I have a program that reads information from a binary file, builds an array list, and displays the info in a text box. Then the user can sort the data in a couple of ways. I want to then save the sorted data in a comma delimited text file. Any help on the saving part? I know how to get the save dialog box but don't quite know how to do the StreamWriter or TextWriter to the file. Thanks