MessageBuffer.Close Method

You should always close a MessageBuffer instance by calling Close when finished working with it. This allows system resources to potentially be freed sooner.

If you have called CreateBufferedCopy to create a message buffer of a message, and inspected the message using CreateMessage, you will get a InvalidOperationException when you attempt to close the buffer using this method. To avoid this problem, you need to recreate the message from the buffer before closing. See the code sample in the Example section for a demonstration of the previous scenario and a way to resolve this problem.

The following example demonstrates how to properly close a message buffer.

public void AfterReceiveReply(ref Message reply, object correlationState)
{
    // Create the buffer
    MessageBuffer buffer = reply.CreateBufferedCopy(13000);
    // Inspect the response (for example, extract the body contents)
    Message thisReply = buffer.CreateMessage();
    XmlDictionaryReader reader = thisReply.GetReaderAtBodyContents();
    StringBuilder info = new StringBuilder();
    XmlWriter writer = XmlWriter.Create(info);
    writer.WriteNode(reader, true);
    writer.Close();
    // Resolution:  Re-create the message from the buffer before
    // closing.
    reply = buffer.CreateMessage();
    // You can close the buffer after the message has been recreated.
    buffer.Close();

}

.NET Framework

.NET Framework Client Profile

Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference