using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(\\(?!color)[^{}]+?\{(\\(?!color)[^{}]+?\{([^{}])+?\}|[^{}])+?\})";
string input = @"text \footnote{foobar} other text \footnote{\cite{citekey1}} text
text\footnote{\cite{citekey1}; \cite{citekey2}.} text \color{red}text
Doesn't find three layers:
\footnote{\command{text\cite{citekey1}1}; \cite{citekey2}.}
";
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