如何匹配字符串中的while \0？

while \\0

import re

string = "while \\0"
pattern = r"while \\0"
matches = re.findall(pattern, string)
print(matches)

import java.util.regex.Matcher;
import java.util.regex.Pattern;

String string = "while \\0";
String pattern = "while \\\\0";
Pattern regex = Pattern.compile(pattern);
Matcher matcher = regex.matcher(string);
while (matcher.find()) {
    System.out.println(matcher.group());
}

using System;
using System.Text.RegularExpressions;

string input = "while \\0";
string pattern = @"while \\0";
MatchCollection matches = Regex.Matches(input, pattern);
foreach (Match match in matches)
{
    Console.WriteLine(match.Value);
}