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1.)Duplicating VB Right() functionality 2.) Seek and replace multiple expressions in a single pass?

Posted By:      Posted Date: October 07, 2010    Points: 0   Category :.NET Framework
Two questions:
1. I want to replicate the functionality of the Right() string function in Regex in order to lop off the first four characters of certain 20 character strings if those leading characters happen to be "K3AH". Right(string,16) would be part of the VB code I'd use to do it but this is what I've come up with using Regex:

Dim re As New Regex("\bK3AH+(?=\d{16})", RegexOptions.Multiline)

Dim source$ = "SRA-7138-29		K3AH1241091742015390	K3AH1241170743153764	6454	dawni001"

source$ = re.Replace(source$, "")
And it seems to work, returning "SRA-7138-29  1241091742015390AH1241170743153764 6454 dawni001"

Is there a better (i.e.,faster, safer, whatever) way to do this?

2. Is it possible, using Regex, to search for multiple (different) expressions and make replacement for all of them while only makin a single pass through a text file?

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