using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?:(?:\^M)|[\n\r])+(id=.*)(?=(?:\^M)|[\n\r])";
string input = @"POST / HTTP/1.1^M
User-Agent: curl/7.27.0^M
Host: 127.0.0.1^M
Accept: */*^M
Content-Length: 55^M
Content-Type: application/x-www-form-urlencoded^M
^M
id=1234&var=test&nextvar=hh%20hg&anothervar=BB55SSKKKkk^M";
RegexOptions options = RegexOptions.Multiline | RegexOptions.IgnoreCase;
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