Throwing Your Own Exceptions - CSharp Custom Type

CSharp examples for Custom Type:Exception

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Introduction

To create your own exception, you must first declare it. Use the following format: 

class ExceptionName : Exception {}

Creating and Throwing Your Own Exception

Demo Code

using System;//from www . ja  va  2s  .co m
class MyThreeException : Exception {}
class MathApp
{
   public static void Main()
   {
      int result;
      try
      {
         result = MyMath.Util( 1, 2 );
         Console.WriteLine( "Result of Util(1, 2) is {0}", result);
         result = MyMath.Util( 3, 4 );
         Console.WriteLine( "Result of Util(3, 4) is {0}", result);
      }
      catch (MyThreeException)
      {
         Console.WriteLine("Ack!  We don't like adding threes.");
      }
      catch (Exception e)
      {
         Console.WriteLine("Exception caught: {0}", e);
      }
      Console.WriteLine("\nAt end of program");
   }
}
class MyMath
{
   static public int Util(int x, int y)
   {
      if(x == 3 || y == 3)
         throw( new MyThreeException() );
      return( x + y );
   }
}

Result


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