using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(
.*
\b(why|what)\b
.*
\?
){2,}";
string input = @"
1) What I love u? Look at me. Why I love u?
3) Why do you look at me?
4) Are you alright?
5) I am sick. How are you?. Well you do not have to answer it. what's up?
6) How are you? I am sick. What's up? Well you do not have to answer it.
7) Why I love u?
8) Any questions? No. Why not? Sure? Ok?
9) Jesus christ. You know what, do I love u? Look at me! Why I love u?
10) what do you want? what do you mean?
";
RegexOptions options = RegexOptions.IgnoreCase | 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