using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^(?!\d+\s*$)\d+.+$";
string input = @"Here goes some text. {tag} A wonderful day. It's soon cristmas.
2 Happy 2019, soon. {Some useful tag!} Something else goes here.
3 Happy ending. Yeppe! See you.
4
5 Happy KKK!
6 Happy B-Day!
7
8 Universe is cool!
9
10 {Tagish}.
11
12 {Slugish}. Here goes another line. {Slugish} since this is a new sentence.
13
14 endline.
4 ";
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