Opening CSV Files From Code?

I have 19 .CSV files that hold engineering data in single and multiple Arrays.I would like to loop through the Directory that contains the files and open each file, fill the array and close the file and continue to the next in Alphabetical order.

This code tells me how many files I have now and will update if I add more.

Dim FolderPath As String = IO.Path.Combine(Application.StartupPath, "DATACSV Files")
Dim TestFolder As New IO.DirectoryInfo(FolderPath)
Dim FileCount As Integer = TestFolder.GetFiles().Count

FileCount give me my number of files but not sure how to continue. I have the code to open and read the file but not how to keep changing the file name for each new file name base on the number of files that exist.