using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?m)^START(.|\n)*?((?=^START)|END_OF_MSG)";
string input = @"HELLO
START ABC DEF GHI JKL
QWER RANDOM TEXT 213%@#!
UIOP RANDOMZXCVB123456
START ABC DEF GHI JKL
ZZZZZ RANDOMTEXT213%@#!
11111 RANDOMZXCVB123456
$$$$$$ SOMEMORETEXT
START ABC DEF GHI JKL
QWER RANDOMTEXT213%@#!
$$$$$ RANDOMZXCVB123456
END_OF_MSG";
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