mangling a text file

Ok so I have a flat comma file that has 20k lines that I need to manipulate.  Each line should represent a unique path to a unique filename comma separated.  It is not possible to re-generate or re-export the data so this is my only option that I have to work with.  Example it should look like this:

user1@foo.org\1234.dat
user1@foo.org\1879.dat
user1@foo.org\28743.dat
user2@foo.org\123.dat
user2@foo.org\123425.dat
user3@foo.org\9090.dat
user4@foo.org\90786.dat
...

what the file looks like is

user1@foo.org,
1234.dat,
1879.dat,
28743.dat,
user2@foo.org,
123.dat,
123425.dat,
user3@foo.org,
9090.dat,
user4@foo.org,
90786.dat
...

The number of files per user varies from 1 to 50 or more but is never zero.  I need someway to parse the file and rewrite it in the "what it should look like" format.
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avatechAsked:
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Kyle AbrahamsSenior .Net DeveloperCommented:
pseudo code:

string user;
string line;

StreamReader sr = readFromFile();

while (line = sr.ReadLine())
{
   if (line.Contains("@") )
   {
     user = line.Trim(',');
     continue;
   }
    File.WriteLine (user + "\\" + line.Trim(",");
}
0

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avatechAuthor Commented:
I'll give that a shot and see where that leads.  Thanks
0
Kyle AbrahamsSenior .Net DeveloperCommented:
let me know if you need more help . . . post the code if it'll help.
0
avatechAuthor Commented:
That worked perfectly - thank you!
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