Visual C++ .NET/Statement/throw

Rethrow Exception

 
#include "stdafx.h"
using namespace System;
void main(){
    try{
        try{
            throw gcnew ApplicationException("\t***Boom***");
            Console::WriteLine("Imbedded Try End");
        }catch (ApplicationException ^ie){
            Console::WriteLine("Caught Exception ");
            Console::WriteLine(ie->Message);
            throw;
        }
        Console::WriteLine("Outer Try End");
    }
    catch (ApplicationException ^oe)
    {
        Console::WriteLine("Recaught Exception ");
        Console::WriteLine(oe->Message);
    }
}

Throw Derived Exception

 

#include "stdafx.h"
using namespace System;
ref class MyException : public ApplicationException
{
public:
    MyException( String ^err ); 
};
MyException::MyException(System::String ^err) : ApplicationException(err) 
{
}
void main(){
    for (int i = 0; i < 3; i++){
        try{
            if (i == 0){
                Console::WriteLine("\tCounter equal to 0");
            }
            else if (i == 1)
            {
                throw gcnew MyException("\t**Exception** Counter equal to 1");
            }
            else
            {
                Console::WriteLine("\tCounter greater than 1");
            }
        }
        catch (MyException ^e)
        {
            Console::WriteLine(e->Message);
        }
    }
}

Throw gcnew exception

 
#include "stdafx.h"
using namespace System;
int main()
{
try
{
     bool error = true;
     // other code
     if (error)
     {
          throw gcnew Exception();
     }
}
catch( Exception^ exception)
{
      // code to handle the exception
}
}

Throw string as exception

 
#include "stdafx.h"
using namespace System;
public ref class MyClass
{
public:
   static void TrySomething()
   {
      throw gcnew String("Error that throws string!");
   }
};
int main()
{
   try
   {
      MyClass::TrySomething();
   }
   catch(String^ s)
   {
      Console::WriteLine(s);
   }
}