using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?=.*[0-9#?!@$%^&*-]) # 1+ digit or special char
(?=.*[A-Z]) # 1+ uc letters
(?=.*[a-z]) # 1+ lc letters
(?=[a-zA-Z0-9#?!@$%^&*-]*$) # all chars valid
(?!.*(.)\1{2}) # no 3+ repeats
.{8,} # length >= 8 and match string
";
string input = @"Test1234!
Tee123stE
Teeest123!
!TESTT1234
Test1234!~";
RegexOptions options = RegexOptions.Multiline | RegexOptions.IgnorePatternWhitespace;
foreach (Match m in Regex.Matches(input, pattern, options))
{
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