using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"USER \((\w+)\)$";
string input = @"Jul 6 14:01:23 computer.name CRON[29440]: USER (good_user)
show_time_of_pid(""Jul 6 14:02:08 computer.name jam_tag=psim[29187]: (UUID:006)
Jul 6 14:02:09 computer.name jam_tag=psim[29187]: (UUID:007)
Jul 6 14:03:01 computer.name CRON[29440]: USER (naughty_user)
Jul 6 14:03:40 computer.name cacheclient[29807]: start syncing from \""0xDEADBEEF\""
Jul 6 14:04:01 computer.name CRON[29440]: USER (naughty_user)
Jul 6 14:05:01 computer.name CRON[29440]: USER (naughty_user)";
RegexOptions options = RegexOptions.Multiline;
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