using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^(.*?\n?.*?\.)(?:.*\(Reminder (\d*)\))?";
string input = @"L-I-F-123Dolor sit amet. (Reminder 3)
L-I-F-123 Dolor sit amet.
L-I-F-123 Dolor sit amet. Lorem Ipsum.
But these break :
L-I-F-123 Dolor sit amet
L-I-F-123 Dolor sit amet. Lorem Ipsum
L-I-F-123 Dolor sit amet.(Lorem Ipsum)
L-I-F-123 Dolor sit amet.(Lorem Ipsum) (Reminder 3)";
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