using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"'([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*([^a']*)a*'";
string substitution = @"'\1\2\3\4\5\6\7\8\9\10\11\12\13\14\15\16\17\18\19\20\21\22\23\24\25\26\27\28\29\30\31\32\33\34\35\36\37\38\39\40\41\42\43\44\45\46\47\48\49\50\51\52\53\54\55\56\57\58\59\60\61\62\63\64\65\66\67\68\69\70\71\72\73\74\75\76\77\78\79\80\81\82\83\84\85\86\87\88\89\90\91\92\93\94\95\96\97\98\99'";
string input = @"This is a text sample.
'And this is a single-quoted text sample'.
And this is another text sample.
""And this is a double-quoted text sample"".
And this is another text sample.
""Nothing to do here"".
And this is another text sample.
'Nothing to do here'.
And this is another text sample.
'And this is another single-quoted text sample'.
And this is another text sample.
""And this is another double-quoted text sample with a lot of a characters a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a"".
";
RegexOptions options = RegexOptions.IgnoreCase;
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