using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?<=notes:.*?)\b\d{1,2}([-\/])\d{1,2}\1\d{4}\b";
string substitution = @"<br> $&";
string input = @"wed and thurs and notes: are just so interesting 02-03-2019 on a new line please 04-05-2020 on another line please wed and thurs and notes: are just so interesting 02/03/2019 on a new line please 04/05/2020 on another line please";
RegexOptions options = RegexOptions.Multiline;
Regex regex = new Regex(pattern, options);
string result = regex.Replace(input, substitution);
}
}
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