为什么$ $总是不匹配到行尾

Question

下面是一个简单的代码片段,演示了.Net正则表达式中行尾匹配("$")的看似错误的行为.我错过了一些明显的东西吗

        string input = "Hello\nWorld\n";
        string regex = @"^Hello\n^World\n";  //Match
        //regex = @"^Hello\nWorld\n";  //Match
        //regex = @"^Hello$";  //Match
        //regex = @"^Hello$World$";  //No match!!!
        //regex = @"^Hello$^World$";  //No match!!!

        Match m = Regex.Match(input, regex, RegexOptions.Multiline | RegexOptions.CultureInvariant);
        Console.WriteLine(m.Success);

Answer 1

$不消耗换行符.@"^Hello$\s+^World$"应该匹配.