using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?:\s|^)\d{1,3}\/\s(?:(?!\s\d{1,3}\/\s)[\s\S])*";
string input = @"1/ This is a string and it
has some text on a new line
2/ And then there's another string that has text only on one line
532/ Another string that has some year on a new line
2020/xyz followed by some letters
720/ This is a match on the same line with another match but the other match won't be captured 721/ And this is the last line ";
foreach (Match m in Regex.Matches(input, pattern))
{
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