C#用户定义的异常

using System;

namespace UserdefinedException {

   class TestTemperature {

      static voID Main(string[] args) {
         Temperature temp = new Temperature();
         try {
            temp.showTemp();
         } catch(TempIsZeroException e) {
            Console.Writeline("TempIsZeroException: {0}", e.Message);
         }
         Console.ReadKey();
      }
   }
}

public class TempIsZeroException: Exception {

   public TempIsZeroException(string message): base(message) {

   }
}

public class Temperature {
   int temperature = 0;

   public voID showTemp() {

      if(temperature == 0) {
         throw (new TempIsZeroException("Zero Temperature found"));
      } else {
         Console.Writeline("Temperature: {0}", temperature);
      }
   }
}