using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\{\{(.*?)\}\}\s*((?:[A-Za-z0-9!#$%&'*+\/=?^_`{|}~.+-])+@(?:(?:[A-Za-z0-9-])+?\.)+(?:[A-Za-z0-9]{2,})+)\s*\{\{\/(\1)\}\}";
string input = @"{{foreach}} mail-1@mail.com {{/foreach}}
{{foreach}} mail-2@mail.com{{/foreach}}
{{foreach}}
mail-3@mail.com
{{/foreach}}
";
RegexOptions options = RegexOptions.Singleline;
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