using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^\[(?P<timestamp>(\d{4}\/\d{2}\/\d{2}\s+\d{2}:\d{2}:\d{2}\.\d{3}[\+\-]\d{2}:\d{2}|\d{4}\/\d{2}\/\d{2}\s+\d{2}:\d{2}:\d{2}))\](?:\[(?<logLevel>[^\]]+)\])*";
string input = @"[2006/01/02 15:04:05.000-07:00] lorem ipsum
[2006/01/02 15:04:05] dolorem doipsum
[2006/01/02 15:04:05.000+01:00] abrakadabra
[2006/01/02 15:04:05] eresh piklosh nemeshchi hunyad sczepenh kamosh";
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