c#.net如何使用正则表达式

//例子1
Regex rx = new Regex(@"^/d{5}-/d{4}$");
string zip = "90210-1234";
Match m = rx.Match(zip);
if (m.Success)
MessageBox.Show("Numerically, " + zip + l        " is a valid zip code.");

//例子2
string zip = "90210-1234";
Match m = Regex.Match(zip,@"^/d{5}-/d{4}$");
if (m.Success)
MessageBox.Show("Numerically, " + zip + l        " is a valid zip code.");