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Exception::GetObjectData Method (SerializationInfo^, StreamingContext)


When overridden in a derived class, sets the SerializationInfo with information about the exception.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)

virtual void GetObjectData(
	SerializationInfo^ info,
	StreamingContext context


Type: System.Runtime.Serialization::SerializationInfo^

The SerializationInfo that holds the serialized object data about the exception being thrown.

Type: System.Runtime.Serialization::StreamingContext

The StreamingContext that contains contextual information about the source or destination.

Exception Condition

The info parameter is a null reference (Nothing in Visual Basic).

GetObjectData sets a SerializationInfo with all the exception object data targeted for serialization. During deserialization, the exception is reconstituted from the SerializationInfo transmitted over the stream.

The following code example defines a derived serializable Exception class that implements GetObjectData, which makes minor changes to two properties and then calls the base class to perform the serialization. The example forces a divide-by-0 error and then creates an instance of the derived exception. The code serializes the instance to a file, deserializes the file into a new exception, which it throws, and then catches and displays the exception's data.

#using <System.Runtime.Serialization.Formatters.Soap.dll>

using namespace System;
using namespace System::IO;
using namespace System::Runtime::Serialization;
using namespace System::Runtime::Serialization::Formatters::Soap;

// Define a serializable derived exception class.

ref class SecondLevelException: public Exception, public ISerializable

   // This public constructor is used by class instantiators.
   SecondLevelException( String^ message, Exception^ inner )
      : Exception( message, inner )
      HelpLink = "";
      Source = "Exception_Class_Samples";


   // This protected constructor is used for deserialization.
   SecondLevelException( SerializationInfo^ info, StreamingContext context )
      : Exception( info, context )


   // GetObjectData performs a custom serialization.
   virtual void GetObjectData( SerializationInfo^ info, StreamingContext context ) override

      // Change the case of two properties, and then use the 
      // method of the base class.
      HelpLink = HelpLink->ToLower();
      Source = Source->ToUpperInvariant();
      Exception::GetObjectData( info, context );


int main()
   Console::WriteLine( "This example of the Exception constructor "
   "and Exception.GetObjectData\nwith Serialization"
   "Info and StreamingContext parameters "
   "generates \nthe following output.\n" );

      // This code forces a division by 0 and catches the 
      // resulting exception.
         int zero = 0;
         int ecks = 1 / zero;
      catch ( Exception^ ex ) 

         // Create a new exception to throw again.
         SecondLevelException^ newExcept = gcnew SecondLevelException( "Forced a division by 0 and threw "
         "another exception.",ex );
         Console::WriteLine( "Forced a division by 0, caught the "
         "resulting exception, \n"
         "and created a derived exception:\n" );
         Console::WriteLine( "HelpLink: {0}", newExcept->HelpLink );
         Console::WriteLine( "Source:   {0}", newExcept->Source );

         // This FileStream is used for the serialization.
         FileStream^ stream = gcnew FileStream( "NewException.dat",FileMode::Create );

            // Serialize the derived exception.
            SoapFormatter^ formatter = gcnew SoapFormatter( nullptr,StreamingContext(StreamingContextStates::File) );
            formatter->Serialize( stream, newExcept );

            // Rewind the stream and deserialize the 
            // exception.
            stream->Position = 0;
            SecondLevelException^ deserExcept = dynamic_cast<SecondLevelException^>(formatter->Deserialize( stream ));
            Console::WriteLine( "\nSerialized the exception, and then "
            "deserialized the resulting stream "
            "into a \nnew exception. "
            "The deserialization changed the case "
            "of certain properties:\n" );

            // Throw the deserialized exception again.
            throw deserExcept;
         catch ( SerializationException^ se ) 
            Console::WriteLine( "Failed to serialize: {0}", se->ToString() );


   catch ( Exception^ ex ) 
      Console::WriteLine( "HelpLink: {0}", ex->HelpLink );
      Console::WriteLine( "Source:   {0}", ex->Source );
      Console::WriteLine( ex->ToString() );


This example of the Exception constructor and Exception.GetObjectData
with SerializationInfo and StreamingContext parameters generates
the following output.

Forced a division by 0, caught the resulting exception,
and created a derived exception:

Source:   Exception_Class_Samples

Serialized the exception, and then deserialized the resulting stream into a
new exception. The deserialization changed the case of certain properties:


SecondLevelException: Forced a division by 0 and threw another exception. ---> S
ystem.DivideByZeroException: Attempted to divide by zero.
   at main()
   --- End of inner exception stack trace ---
   at main()



requires full trust for the immediate caller. This member cannot be used by partially trusted or transparent code.

.NET Framework
Available since 1.1
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