using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\[(run)] ( (?: (?: (?!\[/?\1]) . )* | (?R) )* ) \[/\1]";
string input = @"[run][one]This[/one][two]That[/two][/run]
[run][one]This 2[/one][two]That 2[/two][/run]
[run][one]IF THIS RESULT DO THIS [run][one]This[/one][two]That[/two][/run][/one][two]IF THIS RESULT DO THAT [run][one]This[/one][two]That[/two][/run][/two][/run]
[run][one]IF THIS RESULT DO THIS
[run][one]This[/one][two]That[/two][/run]
[/one][two]IF THIS RESULT DO THAT [run][one]This[/one][two]That[/two][/run][/two][/run]";
RegexOptions options = RegexOptions.Singleline | RegexOptions.IgnorePatternWhitespace;
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