throw exception

using System;//  j a v a 2 s.c o  m
class MainClass {
    public static int AnExceptionFunction(int value) {
        if (value == 0) // Can't divide by zero
            throw new DivideByZeroException("Divide By 0 error!");

        int x = 20 / value;
        return x;
    }

    public static void Main() {
        int value = 0;
        value = AnExceptionFunction(10); // This works ok
        Console.WriteLine("Value = {0}", value);
        AnExceptionFunction(0); // This doesn't
        Console.WriteLine("Value = {0}", value);
    }
}

using System; //from  j a v a2  s. c  o  m
 
class MainClass { 
  public static void Main() { 
    try { 
      Console.WriteLine("Before throw."); 
      throw new DivideByZeroException(); 
    } 
    catch (DivideByZeroException) { 
      // catch the exception 
      Console.WriteLine("Exception caught."); 
    } 
    Console.WriteLine("After try/catch block."); 
  } 
}

using System; //from j ava2s  .c o  m
 
class MainClass { 
  public static void Main() { 
    try { 
      genException(); 
    } 
    catch(IndexOutOfRangeException) { 
      // recatch exception 
     Console.WriteLine("Fatal error -- " + 
                       "program terminated."); 
    } 
  }
  public static void genException() { 
    int[] numer = { 4, 8}; 
    int d = 0; 
 
    for(int i=0; i<10; i++) { 
      try { 
        Console.WriteLine(numer[i] + " / " + 
                          numer[i] + " is " + 
                          numer[i]/d); 
      } 
      catch (DivideByZeroException) { 
        // catch the exception 
        Console.WriteLine("Can't divide by Zero!"); 
      } 
      catch (IndexOutOfRangeException) { 
        // catch the exception 
        Console.WriteLine("No matching element found."); 
        throw; // rethrow the exception 
      } 
    } 
  }   
   
}

using System;//from jav a 2  s.  co m
using System.Collections;

public class MainClass
{
    static void Main() {
        try {
            try {
                ArrayList list = new ArrayList();
                list.Add( 1 );

                Console.WriteLine( "Item 10 = {0}", list[10] );
            }
            finally {
                Console.WriteLine( "Cleaning up..." );
                throw new Exception( "I like to throw" );
            }
        }
        catch( ArgumentOutOfRangeException ) {
            Console.WriteLine( "Oops!  Argument out of range!" );
        }
        catch {
            Console.WriteLine( "Done" );
        }
    }
}