take the first 3 digits and save it to another text file

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I want to take the first 3 digits of the text file into another text file. My file is test.txt

195^20140212^0^H^000000^A
312^20140211^0^H^010000^A
312^20140211^0^H^020000^A

Where I only need to take the 195,312,312 in another text file. How can It be possible? I have tried the below but I am not able to save it to another text file.

C#

string test = @"\\Fdrtse\POI\Debopam\test.txt";
var text = File.ReadAllLines(test);

while (text != null) {
    foreach(var line in text) {
        string[] dataArray = line.Split('^');
    }
}

[Edit: MTHeffron - formatting]

Posted 12-Feb-14 8:29am

DEbopm

Updated 12-Feb-14 8:36am

Matt T Heffron

v2

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Matt T Heffron · Accepted Answer · 2014-02-12T08:42:00

The while (text != null) condition is pointless, File.ReadAllLines() always returns an array of strings (possibly empty) unless it throws an exception.

After you Split() the line into dataArray, you should collect the dataArray[0] values into another List<string> and then at the completion of reading all of the input file, write the contents of that list to your output file, formatting appropriately for your purpose.