using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?<=^|\s)(?=[A-Z\d]*[a-z])(?=[a-z\d]*[A-Z])(?=[a-zA-Z]*[\d])[a-zA-Z\d]{6,30}(?=$|\s)";
string input = @"am2Nals2kdP5 This is some sample text containing an email address of michael.knight@knightrider2000.com
and some cryptic secret like am2Nals2kdP5 and even more text. amdNalsfkdPt test am2Nals2kdP5
#$#fDD5555555
am2Nals2kdP5am2Nals2kdP5
fffddD2
am2Nals2kdP5am2Nals2kdP5
am2Nals2kdP5
am2Nals2kdf";
foreach (Match m in Regex.Matches(input, pattern))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx