C＃正则表达式与其他正则表达式测试人员匹配的模式不匹配

Question

以下是我测试的代码与我的模式不匹配：

using System;
using System.Text.RegularExpressions;

public class Program
{
    public static void Main()
    {
        string test = "Error during request to host: 123.456.78, port: 1234 with status 500 and message={\n    \"messageID\": \"TEST_ID\",\n    \"messageArgs\": [\n        \"12345\"\n    ],\n    \"message\": \"The test having ID \\\"12345\\\" was not found.\",\n    \"recommendedActions\": []\n}";
        Match m = Regex.Match(test, @"message=({.*})", RegexOptions.IgnoreCase | RegexOptions.Multiline);
        Console.WriteLine(m.Success);
        Console.WriteLine(test);
        if(m.Success){
            Console.WriteLine(m.Groups[0]);
            Console.WriteLine(m.Groups[1]);
        }
    }
}

由于某种原因，这不起作用，但我相信这种模式对于捕获message = {}内部的内容是正确的。

这是在正则表达式101中工作：https://regex101.com/r/yY2bQ4/1