using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\{if\s{1}(.+?)\}\n(((?R)|.*?)+)\{\/if\}";
string input = @"{if $name == 'Tree'}
Hey, this is a Tree!
{/if}
{if $name == 'Example'}
{if $number == '1'}
Hey, this is an Example with the number 1
{/if}
{/if}";
RegexOptions options = RegexOptions.Multiline | RegexOptions.IgnoreCase | 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