Replace first 3 digits : Regular Expressions « Regular Expressions « VB.Net Tutorial

Imports System.Text.RegularExpressions

Public Class Tester
    Public Shared Sub Main
       Console.WriteLine(New Regex("\d").Replace("1, 2, 3, 4, 5, 6, 7, 8", "digit", 3))

    End Sub

End Class
digit, digit, digit, 4, 5, 6, 7, 8

20.1.Regular Expressions
20.1.1.Regex Matches
20.1.2.Word count
20.1.4.Count chars: Regex.Matches(quote, .)
20.1.5.Word count: Regex.Matches(quote, '\w+')
20.1.6.Count line: Regex.Matches(quote, '.+\n*')
20.1.8.Match regular expression to string and print out all matches
20.1.9.Using Regex method Replace: substituted for *
20.1.10.Using Regex method Replace: Replace one string with another
20.1.11.Every word replaced by another word
20.1.12.Replace first 3 digits
20.1.13.String split at commas