Why ^*$ matches “127.0.0.1”

^*$

using System;
using System.Text.RegularExpressions;

namespace RegexFubar
{
    class Program
    {
    	static void Main(string[] args)
    	{
    		Console.WriteLine(Regex.IsMatch("127.0.0.1", "^*$"));
    		Console.Read();
    	}
    }
}

# echo -n 127.0.0.1 | perl -n -e 'print (($_ =~ m/(^.*$)/)[0]),"n";'
-> 127.0.0.1
# echo -n 127.0.0.1 | perl -n -e 'print (($_ =~ m/(^*$)/)[0]),"n";'
->

Regex.Match("127.0.0.1", "^*1$")

^+$