using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"^([^\n]+?[\n][^\n]+?[\n])((?:[^\n]+?\n)*?)([^\n]+?[\n][^\n]+?[\n][^\n]+?[\n]*)$";
string input = @"This could
be ""words""
or any text
or pattern
or any amount of lines
need 3 groups:
1 -> lines 1 to 2
2 -> lines leftover
3 -> last 3 lines
";
RegexOptions options = 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