Represents a collection of message headers that are understood. This class cannot be inherited.
Assembly: System.ServiceModel (in System.ServiceModel.dll)
This class contains a collection of message headers that are understood. SOAP processors at various layers (Security, Reliability, Transaction and application dispatcher) must add their MustUnderstand headers to this collection after processing the headers. The dispatcher throws a MessageHeader fault if a header exists in the Message.Headers collection that must be understood, but is not found in this collection.
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.