using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?:(?:\R|\A).+){3}\K\R.+";
string substitution = @"";
string input = @"1
00:07:14,120 --> 00:07:16,953
[French line]
[Russian line]
2
00:07:16,960 --> 00:07:19,952
[French line]
[Russian line]
3
00:07:21,240 --> 00:07:24,835
[French line]
[Russian line]";
RegexOptions options = RegexOptions.Multiline;
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