Imports System

Public Class MyAppException
   Inherits ApplicationException

   Public Sub New(message As [String])
      MyBase.New(message)
   End Sub 'New

   Public Sub New(message As [String], inner As Exception)
      MyBase.New(message, inner)
   End Sub 'New
End Class 'MyAppException

Public Class ExceptExample

   Public Sub ThrowInner()
      Throw New MyAppException("ExceptExample inner exception")
   End Sub 'ThrowInner

   Public Sub CatchInner()
      Try
         Me.ThrowInner()
      Catch e As Exception
         Throw New MyAppException("Error caused by trying ThrowInner.", e)
      End Try
   End Sub 'CatchInner
End Class 'ExceptExample

Public Class Test

   Public Shared Sub Main()
      Dim testInstance As New ExceptExample()
      Try
         testInstance.CatchInner()
      Catch e As Exception
         Console.WriteLine("In Main catch block. Caught: {0}", e.Message)
         Console.WriteLine("Inner Exception is {0}", e.InnerException)
      End Try
   End Sub 'Main
End Class 'Test

using System;
public class MyAppException:ApplicationException 
{
   public MyAppException (String message) : base (message) 
   {}
   public MyAppException (String message, Exception inner) : base(message,inner) {}    
   }
public class ExceptExample 
{
   public void ThrowInner () 
   {
   throw new MyAppException("ExceptExample inner exception");
   }
   public void CatchInner() 
   {
      try 
      {
      this.ThrowInner();
      }
         catch (Exception e) 
         {
         throw new MyAppException("Error caused by trying ThrowInner.",e);
         }
      }
   }
public class Test 
{
   public static void Main() 
   {
   ExceptExample testInstance = new ExceptExample();
      try 
      {
      testInstance.CatchInner();
      }
         catch(Exception e) 
         {
         Console.WriteLine ("In Main catch block. Caught: {0}", e.Message);
         Console.WriteLine ("Inner Exception is {0}",e.InnerException);
         }
      }
}

using namespace System;
public ref class MyAppException: public ApplicationException
{
public:
   MyAppException( String^ message )
      : ApplicationException( message )
   {}

   MyAppException( String^ message, Exception^ inner )
      : ApplicationException( message, inner )
   {}

};

public ref class ExceptExample
{
public:
   void ThrowInner()
   {
      throw gcnew MyAppException( "ExceptExample inner exception" );
   }

   void CatchInner()
   {
      try
      {
         this->ThrowInner();
      }
      catch ( Exception^ e ) 
      {
         throw gcnew MyAppException( "Error caused by trying ThrowInner.",e );
      }

   }

};

int main()
{
   ExceptExample^ testInstance = gcnew ExceptExample;
   try
   {
      testInstance->CatchInner();
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "In Main catch block. Caught: {0}", e->Message );
      Console::WriteLine( "Inner Exception is {0}", e->InnerException );
   }

}