using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^
(?:
(?:(?=\D*\d)(?=[^a-z]*[a-z]))
|
(?:(?=\D*\d)(?=[^!?€%&]*[!?€%&]))
|
(?:(?=\D*\d)(?=[^A-Z]*[A-Z]))
|
(?:(?=[^a-z]*[a-z])(?=[^!?€%&]*[!?€%&]))
|
(?:(?=[^a-z]*[a-z])(?=[^A-Z]*[A-Z]))
|
(?:(?=[^!?€%&]*[!?€%&])(?=[^A-Z]*[A-Z]))
)
.+
$";
string input = @"
1 digit
1 lowercase character
1 special character (!?€%&, etc)
1 uppercase character
1A";
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