Regex Question - lookbehind with wildcard

Question

I have a line of text like this:
<tab>some text<tab>some more text<tab>one||two||three<tab>more text<tab>red||green||blue

I want to find the indexes at the bolded o and r.

My attempt would be if possible:

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pattern = @"(?<=\t.*)\|\|"

foreach (Match match in Regex.Matches(text, pattern)
Console.WriteLine("Found '{0}' at position {1}", match.Value, match.Index);

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Even better would be to match the entire contents of the fields:
one||two||three and red||green||blue

Thanks for your assistance

Answer 1

Check this pattern:

(?<=\t|^)[^\t]+?\|\|[^\t]+?\|\|[^\t]+?(?=\t|$)