Using system;
Namespace Test
{Class clsmain {
Private static string a; [stathread] static void main (string [] args) {string b;
IF (b == ") {Console.WriteLine (" b IS empty ");}
IF (b == null) {console.writeLine ("b is null");} if (a == ") {Console.WriteLine (" a is empty ");} if (a == null) {Console .Writeline ("a is null");}
}
}
} Guess the result of the running of the run. Turn String B to string b = string.empty; IF (b == "")
If "" is meaningful, you can start B = "- 1" to initial words and add a comment, should be better than judging whether it is null or EMPTY
