NetDataContractSerializer.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WCF / Serialization / System / Runtime / Serialization / NetDataContractSerializer.cs / 1305376 / NetDataContractSerializer.cs

                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.Runtime.Serialization 
{
    using System; 
    using System.IO; 
    using System.Xml;
    using System.Security; 
    using System.Collections;
    using System.Security.Permissions;
    using System.Runtime.CompilerServices;
    using System.Runtime.Serialization.Formatters; 
    using System.Collections.Generic;
 
    public sealed class NetDataContractSerializer : XmlObjectSerializer, IFormatter 
    {
        XmlDictionaryString rootName; 
        XmlDictionaryString rootNamespace;
        StreamingContext context;
        SerializationBinder binder;
        ISurrogateSelector surrogateSelector; 
        int maxItemsInObjectGraph;
        bool ignoreExtensionDataObject; 
        FormatterAssemblyStyle assemblyFormat; 
        DataContract cachedDataContract;
        static Hashtable typeNameCache = new Hashtable(); 

        public NetDataContractSerializer()
            : this(new StreamingContext(StreamingContextStates.All))
        { 
        }
 
        public NetDataContractSerializer(StreamingContext context) 
            : this(context, Int32.MaxValue, false, FormatterAssemblyStyle.Full, null)
        { 
        }

        public NetDataContractSerializer(StreamingContext context,
            int maxItemsInObjectGraph, 
            bool ignoreExtensionDataObject,
            FormatterAssemblyStyle assemblyFormat, 
            ISurrogateSelector surrogateSelector) 
        {
            Initialize(context, maxItemsInObjectGraph, ignoreExtensionDataObject, assemblyFormat, surrogateSelector); 
        }

        public NetDataContractSerializer(string rootName, string rootNamespace)
            : this(rootName, rootNamespace, new StreamingContext(StreamingContextStates.All), Int32.MaxValue, false, FormatterAssemblyStyle.Full, null) 
        {
        } 
 
        public NetDataContractSerializer(string rootName, string rootNamespace,
            StreamingContext context, 
            int maxItemsInObjectGraph,
            bool ignoreExtensionDataObject,
            FormatterAssemblyStyle assemblyFormat,
            ISurrogateSelector surrogateSelector) 
        {
            XmlDictionary dictionary = new XmlDictionary(2); 
            Initialize(dictionary.Add(rootName), dictionary.Add(DataContract.GetNamespace(rootNamespace)), context, maxItemsInObjectGraph, ignoreExtensionDataObject, assemblyFormat, surrogateSelector); 
        }
 
        public NetDataContractSerializer(XmlDictionaryString rootName, XmlDictionaryString rootNamespace)
            : this(rootName, rootNamespace, new StreamingContext(StreamingContextStates.All), Int32.MaxValue, false, FormatterAssemblyStyle.Full, null)
        {
        } 

        public NetDataContractSerializer(XmlDictionaryString rootName, XmlDictionaryString rootNamespace, 
            StreamingContext context, 
            int maxItemsInObjectGraph,
            bool ignoreExtensionDataObject, 
            FormatterAssemblyStyle assemblyFormat,
            ISurrogateSelector surrogateSelector)
        {
            Initialize(rootName, rootNamespace, context, maxItemsInObjectGraph, ignoreExtensionDataObject, assemblyFormat, surrogateSelector); 
        }
 
        void Initialize(StreamingContext context, 
            int maxItemsInObjectGraph,
            bool ignoreExtensionDataObject, 
            FormatterAssemblyStyle assemblyFormat,
            ISurrogateSelector surrogateSelector)
        {
            this.context = context; 
            if (maxItemsInObjectGraph < 0)
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("maxItemsInObjectGraph", SR.GetString(SR.ValueMustBeNonNegative))); 
            this.maxItemsInObjectGraph = maxItemsInObjectGraph; 
            this.ignoreExtensionDataObject = ignoreExtensionDataObject;
            this.surrogateSelector = surrogateSelector; 
            this.AssemblyFormat = assemblyFormat;
        }

        void Initialize(XmlDictionaryString rootName, XmlDictionaryString rootNamespace, 
            StreamingContext context,
            int maxItemsInObjectGraph, 
            bool ignoreExtensionDataObject, 
            FormatterAssemblyStyle assemblyFormat,
            ISurrogateSelector surrogateSelector) 
        {
            Initialize(context, maxItemsInObjectGraph, ignoreExtensionDataObject, assemblyFormat, surrogateSelector);
            this.rootName = rootName;
            this.rootNamespace = rootNamespace; 
        }
 
        public StreamingContext Context 
        {
            get { return context; } 
            set { context = value; }
        }

        public SerializationBinder Binder 
        {
            get { return binder; } 
            set { binder = value; } 
        }
 
        public ISurrogateSelector SurrogateSelector
        {
            get { return surrogateSelector; }
            set { surrogateSelector = value; } 
        }
 
        public FormatterAssemblyStyle AssemblyFormat 
        {
            get { return assemblyFormat; } 
            set
            {
                if (value != FormatterAssemblyStyle.Full && value != FormatterAssemblyStyle.Simple)
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.InvalidAssemblyFormat, value))); 
                assemblyFormat = value;
            } 
        } 

        public int MaxItemsInObjectGraph 
        {
            get { return maxItemsInObjectGraph; }
        }
 
        public bool IgnoreExtensionDataObject
        { 
            get { return ignoreExtensionDataObject; } 
        }
 
        public void Serialize(Stream stream, object graph)
        {
            base.WriteObject(stream, graph);
        } 

        public object Deserialize(Stream stream) 
        { 
            return base.ReadObject(stream);
        } 

        internal override void InternalWriteObject(XmlWriterDelegator writer, object graph)
        {
            Hashtable surrogateDataContracts = null; 
            DataContract contract = GetDataContract(graph, ref surrogateDataContracts);
 
            InternalWriteStartObject(writer, graph, contract); 
            InternalWriteObjectContent(writer, graph, contract, surrogateDataContracts);
            InternalWriteEndObject(writer); 
        }

        public override void WriteObject(XmlWriter writer, object graph)
        { 
            WriteObjectHandleExceptions(new XmlWriterDelegator(writer), graph);
        } 
 
        public override void WriteStartObject(XmlWriter writer, object graph)
        { 
            WriteStartObjectHandleExceptions(new XmlWriterDelegator(writer), graph);
        }

        public override void WriteObjectContent(XmlWriter writer, object graph) 
        {
            WriteObjectContentHandleExceptions(new XmlWriterDelegator(writer), graph); 
        } 

        public override void WriteEndObject(XmlWriter writer) 
        {
            WriteEndObjectHandleExceptions(new XmlWriterDelegator(writer));
        }
 
        public override void WriteStartObject(XmlDictionaryWriter writer, object graph)
        { 
            WriteStartObjectHandleExceptions(new XmlWriterDelegator(writer), graph); 
        }
 
        internal override void InternalWriteStartObject(XmlWriterDelegator writer, object graph)
        {
            Hashtable surrogateDataContracts = null;
            DataContract contract = GetDataContract(graph, ref surrogateDataContracts); 
            InternalWriteStartObject(writer, graph, contract);
        } 
 
        void InternalWriteStartObject(XmlWriterDelegator writer, object graph, DataContract contract)
        { 
            WriteRootElement(writer, contract, rootName, rootNamespace, CheckIfNeedsContractNsAtRoot(rootName, rootNamespace, contract));
        }

        public override void WriteObjectContent(XmlDictionaryWriter writer, object graph) 
        {
            WriteObjectContentHandleExceptions(new XmlWriterDelegator(writer), graph); 
        } 

        internal override void InternalWriteObjectContent(XmlWriterDelegator writer, object graph) 
        {
            Hashtable surrogateDataContracts = null;
            DataContract contract = GetDataContract(graph, ref surrogateDataContracts);
            InternalWriteObjectContent(writer, graph, contract, surrogateDataContracts); 
        }
 
        void InternalWriteObjectContent(XmlWriterDelegator writer, object graph, DataContract contract, Hashtable surrogateDataContracts) 
        {
            if (MaxItemsInObjectGraph == 0) 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.ExceededMaxItemsQuota, MaxItemsInObjectGraph)));

            if (IsRootXmlAny(rootName, contract))
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.IsAnyNotSupportedByNetDataContractSerializer, contract.UnderlyingType)));
            } 
            else if (graph == null) 
            {
                WriteNull(writer); 
            }
            else
            {
                Type graphType = graph.GetType(); 
                if (contract.UnderlyingType != graphType)
                    contract = GetDataContract(graph, ref surrogateDataContracts); 
 
                XmlObjectSerializerWriteContext context = null;
                if (contract.CanContainReferences) 
                {
                    context = XmlObjectSerializerWriteContext.CreateContext(this, surrogateDataContracts);
                    context.HandleGraphAtTopLevel(writer, graph, contract);
                } 

                WriteClrTypeInfo(writer, contract, binder); 
                contract.WriteXmlValue(writer, graph, context); 
            }
        } 

        // Update the overloads whenever you are changing this method
        internal static void WriteClrTypeInfo(XmlWriterDelegator writer, DataContract dataContract, SerializationBinder binder)
        { 
            if (!dataContract.IsISerializable && !(dataContract is SurrogateDataContract))
            { 
                TypeInformation typeInformation = null; 
                string clrTypeName = null;
                string clrAssemblyName = null; 

                if (binder != null)
                {
                    binder.BindToName(dataContract.OriginalUnderlyingType, out clrAssemblyName, out clrTypeName); 
                }
 
                if (clrTypeName == null) 
                {
                    typeInformation = NetDataContractSerializer.GetTypeInformation(dataContract.OriginalUnderlyingType); 
                    clrTypeName = typeInformation.FullTypeName;
                }

                if (clrAssemblyName == null) 
                {
                    clrAssemblyName = (typeInformation == null) ? 
                        NetDataContractSerializer.GetTypeInformation(dataContract.OriginalUnderlyingType).AssemblyString : 
                        typeInformation.AssemblyString;
                } 

                WriteClrTypeInfo(writer, clrTypeName, clrAssemblyName);
            }
        } 

        // Update the overloads whenever you are changing this method 
        internal static void WriteClrTypeInfo(XmlWriterDelegator writer, Type dataContractType, SerializationBinder binder, string defaultClrTypeName, string defaultClrAssemblyName) 
        {
            string clrTypeName = null; 
            string clrAssemblyName = null;

            if (binder != null)
            { 
                binder.BindToName(dataContractType, out clrAssemblyName, out clrTypeName);
            } 
 
            if (clrTypeName == null)
            { 
                clrTypeName = defaultClrTypeName;
            }

            if (clrAssemblyName == null) 
            {
                clrAssemblyName = defaultClrAssemblyName; 
            } 

            WriteClrTypeInfo(writer, clrTypeName, clrAssemblyName); 
        }

        // Update the overloads whenever you are changing this method
        internal static void WriteClrTypeInfo(XmlWriterDelegator writer, Type dataContractType, SerializationBinder binder, SerializationInfo serInfo) 
        {
            TypeInformation typeInformation = null; 
            string clrTypeName = null; 
            string clrAssemblyName = null;
 
            if (binder != null)
            {
                binder.BindToName(dataContractType, out clrAssemblyName, out clrTypeName);
            } 

            if (clrTypeName == null) 
            { 
                if (serInfo.IsFullTypeNameSetExplicit)
                { 
                    clrTypeName = serInfo.FullTypeName;
                }
                else
                { 
                    typeInformation = NetDataContractSerializer.GetTypeInformation(serInfo.ObjectType);
                    clrTypeName = typeInformation.FullTypeName; 
                } 
            }
 
            if (clrAssemblyName == null)
            {
                if (serInfo.IsAssemblyNameSetExplicit)
                { 
                    clrAssemblyName = serInfo.AssemblyName;
                } 
                else 
                {
                    clrAssemblyName = (typeInformation == null) ? 
                    NetDataContractSerializer.GetTypeInformation(serInfo.ObjectType).AssemblyString :
                    typeInformation.AssemblyString;
                }
            } 

            WriteClrTypeInfo(writer, clrTypeName, clrAssemblyName); 
        } 

        static void WriteClrTypeInfo(XmlWriterDelegator writer, string clrTypeName, string clrAssemblyName) 
        {
            if (clrTypeName != null)
                writer.WriteAttributeString(Globals.SerPrefix, DictionaryGlobals.ClrTypeLocalName, DictionaryGlobals.SerializationNamespace, DataContract.GetClrTypeString(clrTypeName));
            if (clrAssemblyName != null) 
                writer.WriteAttributeString(Globals.SerPrefix, DictionaryGlobals.ClrAssemblyLocalName, DictionaryGlobals.SerializationNamespace, DataContract.GetClrTypeString(clrAssemblyName));
        } 
 
        public override void WriteEndObject(XmlDictionaryWriter writer)
        { 
            WriteEndObjectHandleExceptions(new XmlWriterDelegator(writer));
        }

        internal override void InternalWriteEndObject(XmlWriterDelegator writer) 
        {
            writer.WriteEndElement(); 
        } 

        public override object ReadObject(XmlReader reader) 
        {
            return ReadObjectHandleExceptions(new XmlReaderDelegator(reader), true /*verifyObjectName*/);
        }
 
        public override object ReadObject(XmlReader reader, bool verifyObjectName)
        { 
            return ReadObjectHandleExceptions(new XmlReaderDelegator(reader), verifyObjectName); 
        }
 
        public override bool IsStartObject(XmlReader reader)
        {
            return IsStartObjectHandleExceptions(new XmlReaderDelegator(reader));
        } 

        public override object ReadObject(XmlDictionaryReader reader, bool verifyObjectName) 
        { 
            return ReadObjectHandleExceptions(new XmlReaderDelegator(reader), verifyObjectName);
        } 

        public override bool IsStartObject(XmlDictionaryReader reader)
        {
            return IsStartObjectHandleExceptions(new XmlReaderDelegator(reader)); 
        }
 
        internal override object InternalReadObject(XmlReaderDelegator xmlReader, bool verifyObjectName) 
        {
            if (MaxItemsInObjectGraph == 0) 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.ExceededMaxItemsQuota, MaxItemsInObjectGraph)));

            // verifyObjectName has no effect in SharedType mode
            if (!IsStartElement(xmlReader)) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationExceptionWithReaderDetails(SR.GetString(SR.ExpectingElementAtDeserialize, XmlNodeType.Element), xmlReader)); 
            } 

            XmlObjectSerializerReadContext context = XmlObjectSerializerReadContext.CreateContext(this); 
            return context.InternalDeserialize(xmlReader, null, null, null);
        }

        internal override bool InternalIsStartObject(XmlReaderDelegator reader) 
        {
            return IsStartElement(reader); 
        } 

        internal DataContract GetDataContract(object obj, ref Hashtable surrogateDataContracts) 
        {
            return GetDataContract(((obj == null) ? Globals.TypeOfObject : obj.GetType()), ref surrogateDataContracts);
        }
 
        internal DataContract GetDataContract(Type type, ref Hashtable surrogateDataContracts)
        { 
            return GetDataContract(type.TypeHandle, type, ref surrogateDataContracts); 
        }
 
        internal DataContract GetDataContract(RuntimeTypeHandle typeHandle, Type type, ref Hashtable surrogateDataContracts)
        {
            DataContract dataContract = GetDataContractFromSurrogateSelector(surrogateSelector, Context, typeHandle, type, ref surrogateDataContracts);
            if (dataContract != null) 
                return dataContract;
 
            if (cachedDataContract == null) 
            {
                dataContract = DataContract.GetDataContract(typeHandle, type, SerializationMode.SharedType); 
                cachedDataContract = dataContract;
                return dataContract;
            }
 
            DataContract currentCachedDataContract = cachedDataContract;
            if (currentCachedDataContract.UnderlyingType.TypeHandle.Equals(typeHandle)) 
                return currentCachedDataContract; 

            return DataContract.GetDataContract(typeHandle, type, SerializationMode.SharedType); 
        }

        [Fx.Tag.SecurityNote(Critical = "Calls the critical methods of ISurrogateSelector", Safe = "Demands for FullTrust")]
        [SecuritySafeCritical] 
        [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
        [MethodImpl(MethodImplOptions.NoInlining)] 
        static ISerializationSurrogate GetSurrogate(Type type, ISurrogateSelector surrogateSelector, StreamingContext context) 
        {
            ISurrogateSelector surrogateSelectorNotUsed; 
            return surrogateSelector.GetSurrogate(type, context, out surrogateSelectorNotUsed);
        }

        internal static DataContract GetDataContractFromSurrogateSelector(ISurrogateSelector surrogateSelector, StreamingContext context, RuntimeTypeHandle typeHandle, Type type, ref Hashtable surrogateDataContracts) 
        {
            if (surrogateSelector == null) 
                return null; 

            if (type == null) 
                type = Type.GetTypeFromHandle(typeHandle);
            DataContract builtInDataContract = DataContract.GetBuiltInDataContract(type);
            if (builtInDataContract != null)
                return builtInDataContract; 
            if (surrogateDataContracts != null)
            { 
                DataContract cachedSurrogateContract = (DataContract)surrogateDataContracts[type]; 
                if (cachedSurrogateContract != null)
                    return cachedSurrogateContract; 
            }
            DataContract surrogateContract = null;
            ISerializationSurrogate surrogate = GetSurrogate(type, surrogateSelector, context);
            if (surrogate != null) 
                surrogateContract = new SurrogateDataContract(type, surrogate);
            else if (type.IsArray) 
            { 
                Type elementType = type.GetElementType();
                DataContract itemContract = GetDataContractFromSurrogateSelector(surrogateSelector, context, elementType.TypeHandle, elementType, ref surrogateDataContracts); 
                if (itemContract == null)
                    itemContract = DataContract.GetDataContract(elementType.TypeHandle, elementType, SerializationMode.SharedType);
                surrogateContract = new CollectionDataContract(type, itemContract);
            } 
            if (surrogateContract != null)
            { 
                if (surrogateDataContracts == null) 
                    surrogateDataContracts = new Hashtable();
                surrogateDataContracts.Add(type, surrogateContract); 
                return surrogateContract;
            }
            return null;
        } 

 
        internal static TypeInformation GetTypeInformation(Type type) 
        {
            TypeInformation typeInformation = null; 
            object typeInformationObject = typeNameCache[type];
            if (typeInformationObject == null)
            {
                typeInformation = new TypeInformation(DataContract.GetClrTypeFullNameUsingTypeForwardedFromAttribute(type), DataContract.GetClrAssemblyName(type)); 
                lock (typeNameCache)
                { 
                    typeNameCache[type] = typeInformation; 
                }
            } 
            else
            {
                typeInformation = (TypeInformation) typeInformationObject;
            } 
            return typeInformation;
        } 
    } 

} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.Runtime.Serialization 
{
    using System; 
    using System.IO; 
    using System.Xml;
    using System.Security; 
    using System.Collections;
    using System.Security.Permissions;
    using System.Runtime.CompilerServices;
    using System.Runtime.Serialization.Formatters; 
    using System.Collections.Generic;
 
    public sealed class NetDataContractSerializer : XmlObjectSerializer, IFormatter 
    {
        XmlDictionaryString rootName; 
        XmlDictionaryString rootNamespace;
        StreamingContext context;
        SerializationBinder binder;
        ISurrogateSelector surrogateSelector; 
        int maxItemsInObjectGraph;
        bool ignoreExtensionDataObject; 
        FormatterAssemblyStyle assemblyFormat; 
        DataContract cachedDataContract;
        static Hashtable typeNameCache = new Hashtable(); 

        public NetDataContractSerializer()
            : this(new StreamingContext(StreamingContextStates.All))
        { 
        }
 
        public NetDataContractSerializer(StreamingContext context) 
            : this(context, Int32.MaxValue, false, FormatterAssemblyStyle.Full, null)
        { 
        }

        public NetDataContractSerializer(StreamingContext context,
            int maxItemsInObjectGraph, 
            bool ignoreExtensionDataObject,
            FormatterAssemblyStyle assemblyFormat, 
            ISurrogateSelector surrogateSelector) 
        {
            Initialize(context, maxItemsInObjectGraph, ignoreExtensionDataObject, assemblyFormat, surrogateSelector); 
        }

        public NetDataContractSerializer(string rootName, string rootNamespace)
            : this(rootName, rootNamespace, new StreamingContext(StreamingContextStates.All), Int32.MaxValue, false, FormatterAssemblyStyle.Full, null) 
        {
        } 
 
        public NetDataContractSerializer(string rootName, string rootNamespace,
            StreamingContext context, 
            int maxItemsInObjectGraph,
            bool ignoreExtensionDataObject,
            FormatterAssemblyStyle assemblyFormat,
            ISurrogateSelector surrogateSelector) 
        {
            XmlDictionary dictionary = new XmlDictionary(2); 
            Initialize(dictionary.Add(rootName), dictionary.Add(DataContract.GetNamespace(rootNamespace)), context, maxItemsInObjectGraph, ignoreExtensionDataObject, assemblyFormat, surrogateSelector); 
        }
 
        public NetDataContractSerializer(XmlDictionaryString rootName, XmlDictionaryString rootNamespace)
            : this(rootName, rootNamespace, new StreamingContext(StreamingContextStates.All), Int32.MaxValue, false, FormatterAssemblyStyle.Full, null)
        {
        } 

        public NetDataContractSerializer(XmlDictionaryString rootName, XmlDictionaryString rootNamespace, 
            StreamingContext context, 
            int maxItemsInObjectGraph,
            bool ignoreExtensionDataObject, 
            FormatterAssemblyStyle assemblyFormat,
            ISurrogateSelector surrogateSelector)
        {
            Initialize(rootName, rootNamespace, context, maxItemsInObjectGraph, ignoreExtensionDataObject, assemblyFormat, surrogateSelector); 
        }
 
        void Initialize(StreamingContext context, 
            int maxItemsInObjectGraph,
            bool ignoreExtensionDataObject, 
            FormatterAssemblyStyle assemblyFormat,
            ISurrogateSelector surrogateSelector)
        {
            this.context = context; 
            if (maxItemsInObjectGraph < 0)
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentOutOfRangeException("maxItemsInObjectGraph", SR.GetString(SR.ValueMustBeNonNegative))); 
            this.maxItemsInObjectGraph = maxItemsInObjectGraph; 
            this.ignoreExtensionDataObject = ignoreExtensionDataObject;
            this.surrogateSelector = surrogateSelector; 
            this.AssemblyFormat = assemblyFormat;
        }

        void Initialize(XmlDictionaryString rootName, XmlDictionaryString rootNamespace, 
            StreamingContext context,
            int maxItemsInObjectGraph, 
            bool ignoreExtensionDataObject, 
            FormatterAssemblyStyle assemblyFormat,
            ISurrogateSelector surrogateSelector) 
        {
            Initialize(context, maxItemsInObjectGraph, ignoreExtensionDataObject, assemblyFormat, surrogateSelector);
            this.rootName = rootName;
            this.rootNamespace = rootNamespace; 
        }
 
        public StreamingContext Context 
        {
            get { return context; } 
            set { context = value; }
        }

        public SerializationBinder Binder 
        {
            get { return binder; } 
            set { binder = value; } 
        }
 
        public ISurrogateSelector SurrogateSelector
        {
            get { return surrogateSelector; }
            set { surrogateSelector = value; } 
        }
 
        public FormatterAssemblyStyle AssemblyFormat 
        {
            get { return assemblyFormat; } 
            set
            {
                if (value != FormatterAssemblyStyle.Full && value != FormatterAssemblyStyle.Simple)
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new ArgumentException(SR.GetString(SR.InvalidAssemblyFormat, value))); 
                assemblyFormat = value;
            } 
        } 

        public int MaxItemsInObjectGraph 
        {
            get { return maxItemsInObjectGraph; }
        }
 
        public bool IgnoreExtensionDataObject
        { 
            get { return ignoreExtensionDataObject; } 
        }
 
        public void Serialize(Stream stream, object graph)
        {
            base.WriteObject(stream, graph);
        } 

        public object Deserialize(Stream stream) 
        { 
            return base.ReadObject(stream);
        } 

        internal override void InternalWriteObject(XmlWriterDelegator writer, object graph)
        {
            Hashtable surrogateDataContracts = null; 
            DataContract contract = GetDataContract(graph, ref surrogateDataContracts);
 
            InternalWriteStartObject(writer, graph, contract); 
            InternalWriteObjectContent(writer, graph, contract, surrogateDataContracts);
            InternalWriteEndObject(writer); 
        }

        public override void WriteObject(XmlWriter writer, object graph)
        { 
            WriteObjectHandleExceptions(new XmlWriterDelegator(writer), graph);
        } 
 
        public override void WriteStartObject(XmlWriter writer, object graph)
        { 
            WriteStartObjectHandleExceptions(new XmlWriterDelegator(writer), graph);
        }

        public override void WriteObjectContent(XmlWriter writer, object graph) 
        {
            WriteObjectContentHandleExceptions(new XmlWriterDelegator(writer), graph); 
        } 

        public override void WriteEndObject(XmlWriter writer) 
        {
            WriteEndObjectHandleExceptions(new XmlWriterDelegator(writer));
        }
 
        public override void WriteStartObject(XmlDictionaryWriter writer, object graph)
        { 
            WriteStartObjectHandleExceptions(new XmlWriterDelegator(writer), graph); 
        }
 
        internal override void InternalWriteStartObject(XmlWriterDelegator writer, object graph)
        {
            Hashtable surrogateDataContracts = null;
            DataContract contract = GetDataContract(graph, ref surrogateDataContracts); 
            InternalWriteStartObject(writer, graph, contract);
        } 
 
        void InternalWriteStartObject(XmlWriterDelegator writer, object graph, DataContract contract)
        { 
            WriteRootElement(writer, contract, rootName, rootNamespace, CheckIfNeedsContractNsAtRoot(rootName, rootNamespace, contract));
        }

        public override void WriteObjectContent(XmlDictionaryWriter writer, object graph) 
        {
            WriteObjectContentHandleExceptions(new XmlWriterDelegator(writer), graph); 
        } 

        internal override void InternalWriteObjectContent(XmlWriterDelegator writer, object graph) 
        {
            Hashtable surrogateDataContracts = null;
            DataContract contract = GetDataContract(graph, ref surrogateDataContracts);
            InternalWriteObjectContent(writer, graph, contract, surrogateDataContracts); 
        }
 
        void InternalWriteObjectContent(XmlWriterDelegator writer, object graph, DataContract contract, Hashtable surrogateDataContracts) 
        {
            if (MaxItemsInObjectGraph == 0) 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.ExceededMaxItemsQuota, MaxItemsInObjectGraph)));

            if (IsRootXmlAny(rootName, contract))
            { 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.IsAnyNotSupportedByNetDataContractSerializer, contract.UnderlyingType)));
            } 
            else if (graph == null) 
            {
                WriteNull(writer); 
            }
            else
            {
                Type graphType = graph.GetType(); 
                if (contract.UnderlyingType != graphType)
                    contract = GetDataContract(graph, ref surrogateDataContracts); 
 
                XmlObjectSerializerWriteContext context = null;
                if (contract.CanContainReferences) 
                {
                    context = XmlObjectSerializerWriteContext.CreateContext(this, surrogateDataContracts);
                    context.HandleGraphAtTopLevel(writer, graph, contract);
                } 

                WriteClrTypeInfo(writer, contract, binder); 
                contract.WriteXmlValue(writer, graph, context); 
            }
        } 

        // Update the overloads whenever you are changing this method
        internal static void WriteClrTypeInfo(XmlWriterDelegator writer, DataContract dataContract, SerializationBinder binder)
        { 
            if (!dataContract.IsISerializable && !(dataContract is SurrogateDataContract))
            { 
                TypeInformation typeInformation = null; 
                string clrTypeName = null;
                string clrAssemblyName = null; 

                if (binder != null)
                {
                    binder.BindToName(dataContract.OriginalUnderlyingType, out clrAssemblyName, out clrTypeName); 
                }
 
                if (clrTypeName == null) 
                {
                    typeInformation = NetDataContractSerializer.GetTypeInformation(dataContract.OriginalUnderlyingType); 
                    clrTypeName = typeInformation.FullTypeName;
                }

                if (clrAssemblyName == null) 
                {
                    clrAssemblyName = (typeInformation == null) ? 
                        NetDataContractSerializer.GetTypeInformation(dataContract.OriginalUnderlyingType).AssemblyString : 
                        typeInformation.AssemblyString;
                } 

                WriteClrTypeInfo(writer, clrTypeName, clrAssemblyName);
            }
        } 

        // Update the overloads whenever you are changing this method 
        internal static void WriteClrTypeInfo(XmlWriterDelegator writer, Type dataContractType, SerializationBinder binder, string defaultClrTypeName, string defaultClrAssemblyName) 
        {
            string clrTypeName = null; 
            string clrAssemblyName = null;

            if (binder != null)
            { 
                binder.BindToName(dataContractType, out clrAssemblyName, out clrTypeName);
            } 
 
            if (clrTypeName == null)
            { 
                clrTypeName = defaultClrTypeName;
            }

            if (clrAssemblyName == null) 
            {
                clrAssemblyName = defaultClrAssemblyName; 
            } 

            WriteClrTypeInfo(writer, clrTypeName, clrAssemblyName); 
        }

        // Update the overloads whenever you are changing this method
        internal static void WriteClrTypeInfo(XmlWriterDelegator writer, Type dataContractType, SerializationBinder binder, SerializationInfo serInfo) 
        {
            TypeInformation typeInformation = null; 
            string clrTypeName = null; 
            string clrAssemblyName = null;
 
            if (binder != null)
            {
                binder.BindToName(dataContractType, out clrAssemblyName, out clrTypeName);
            } 

            if (clrTypeName == null) 
            { 
                if (serInfo.IsFullTypeNameSetExplicit)
                { 
                    clrTypeName = serInfo.FullTypeName;
                }
                else
                { 
                    typeInformation = NetDataContractSerializer.GetTypeInformation(serInfo.ObjectType);
                    clrTypeName = typeInformation.FullTypeName; 
                } 
            }
 
            if (clrAssemblyName == null)
            {
                if (serInfo.IsAssemblyNameSetExplicit)
                { 
                    clrAssemblyName = serInfo.AssemblyName;
                } 
                else 
                {
                    clrAssemblyName = (typeInformation == null) ? 
                    NetDataContractSerializer.GetTypeInformation(serInfo.ObjectType).AssemblyString :
                    typeInformation.AssemblyString;
                }
            } 

            WriteClrTypeInfo(writer, clrTypeName, clrAssemblyName); 
        } 

        static void WriteClrTypeInfo(XmlWriterDelegator writer, string clrTypeName, string clrAssemblyName) 
        {
            if (clrTypeName != null)
                writer.WriteAttributeString(Globals.SerPrefix, DictionaryGlobals.ClrTypeLocalName, DictionaryGlobals.SerializationNamespace, DataContract.GetClrTypeString(clrTypeName));
            if (clrAssemblyName != null) 
                writer.WriteAttributeString(Globals.SerPrefix, DictionaryGlobals.ClrAssemblyLocalName, DictionaryGlobals.SerializationNamespace, DataContract.GetClrTypeString(clrAssemblyName));
        } 
 
        public override void WriteEndObject(XmlDictionaryWriter writer)
        { 
            WriteEndObjectHandleExceptions(new XmlWriterDelegator(writer));
        }

        internal override void InternalWriteEndObject(XmlWriterDelegator writer) 
        {
            writer.WriteEndElement(); 
        } 

        public override object ReadObject(XmlReader reader) 
        {
            return ReadObjectHandleExceptions(new XmlReaderDelegator(reader), true /*verifyObjectName*/);
        }
 
        public override object ReadObject(XmlReader reader, bool verifyObjectName)
        { 
            return ReadObjectHandleExceptions(new XmlReaderDelegator(reader), verifyObjectName); 
        }
 
        public override bool IsStartObject(XmlReader reader)
        {
            return IsStartObjectHandleExceptions(new XmlReaderDelegator(reader));
        } 

        public override object ReadObject(XmlDictionaryReader reader, bool verifyObjectName) 
        { 
            return ReadObjectHandleExceptions(new XmlReaderDelegator(reader), verifyObjectName);
        } 

        public override bool IsStartObject(XmlDictionaryReader reader)
        {
            return IsStartObjectHandleExceptions(new XmlReaderDelegator(reader)); 
        }
 
        internal override object InternalReadObject(XmlReaderDelegator xmlReader, bool verifyObjectName) 
        {
            if (MaxItemsInObjectGraph == 0) 
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationException(SR.GetString(SR.ExceededMaxItemsQuota, MaxItemsInObjectGraph)));

            // verifyObjectName has no effect in SharedType mode
            if (!IsStartElement(xmlReader)) 
            {
                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(XmlObjectSerializer.CreateSerializationExceptionWithReaderDetails(SR.GetString(SR.ExpectingElementAtDeserialize, XmlNodeType.Element), xmlReader)); 
            } 

            XmlObjectSerializerReadContext context = XmlObjectSerializerReadContext.CreateContext(this); 
            return context.InternalDeserialize(xmlReader, null, null, null);
        }

        internal override bool InternalIsStartObject(XmlReaderDelegator reader) 
        {
            return IsStartElement(reader); 
        } 

        internal DataContract GetDataContract(object obj, ref Hashtable surrogateDataContracts) 
        {
            return GetDataContract(((obj == null) ? Globals.TypeOfObject : obj.GetType()), ref surrogateDataContracts);
        }
 
        internal DataContract GetDataContract(Type type, ref Hashtable surrogateDataContracts)
        { 
            return GetDataContract(type.TypeHandle, type, ref surrogateDataContracts); 
        }
 
        internal DataContract GetDataContract(RuntimeTypeHandle typeHandle, Type type, ref Hashtable surrogateDataContracts)
        {
            DataContract dataContract = GetDataContractFromSurrogateSelector(surrogateSelector, Context, typeHandle, type, ref surrogateDataContracts);
            if (dataContract != null) 
                return dataContract;
 
            if (cachedDataContract == null) 
            {
                dataContract = DataContract.GetDataContract(typeHandle, type, SerializationMode.SharedType); 
                cachedDataContract = dataContract;
                return dataContract;
            }
 
            DataContract currentCachedDataContract = cachedDataContract;
            if (currentCachedDataContract.UnderlyingType.TypeHandle.Equals(typeHandle)) 
                return currentCachedDataContract; 

            return DataContract.GetDataContract(typeHandle, type, SerializationMode.SharedType); 
        }

        [Fx.Tag.SecurityNote(Critical = "Calls the critical methods of ISurrogateSelector", Safe = "Demands for FullTrust")]
        [SecuritySafeCritical] 
        [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]
        [MethodImpl(MethodImplOptions.NoInlining)] 
        static ISerializationSurrogate GetSurrogate(Type type, ISurrogateSelector surrogateSelector, StreamingContext context) 
        {
            ISurrogateSelector surrogateSelectorNotUsed; 
            return surrogateSelector.GetSurrogate(type, context, out surrogateSelectorNotUsed);
        }

        internal static DataContract GetDataContractFromSurrogateSelector(ISurrogateSelector surrogateSelector, StreamingContext context, RuntimeTypeHandle typeHandle, Type type, ref Hashtable surrogateDataContracts) 
        {
            if (surrogateSelector == null) 
                return null; 

            if (type == null) 
                type = Type.GetTypeFromHandle(typeHandle);
            DataContract builtInDataContract = DataContract.GetBuiltInDataContract(type);
            if (builtInDataContract != null)
                return builtInDataContract; 
            if (surrogateDataContracts != null)
            { 
                DataContract cachedSurrogateContract = (DataContract)surrogateDataContracts[type]; 
                if (cachedSurrogateContract != null)
                    return cachedSurrogateContract; 
            }
            DataContract surrogateContract = null;
            ISerializationSurrogate surrogate = GetSurrogate(type, surrogateSelector, context);
            if (surrogate != null) 
                surrogateContract = new SurrogateDataContract(type, surrogate);
            else if (type.IsArray) 
            { 
                Type elementType = type.GetElementType();
                DataContract itemContract = GetDataContractFromSurrogateSelector(surrogateSelector, context, elementType.TypeHandle, elementType, ref surrogateDataContracts); 
                if (itemContract == null)
                    itemContract = DataContract.GetDataContract(elementType.TypeHandle, elementType, SerializationMode.SharedType);
                surrogateContract = new CollectionDataContract(type, itemContract);
            } 
            if (surrogateContract != null)
            { 
                if (surrogateDataContracts == null) 
                    surrogateDataContracts = new Hashtable();
                surrogateDataContracts.Add(type, surrogateContract); 
                return surrogateContract;
            }
            return null;
        } 

 
        internal static TypeInformation GetTypeInformation(Type type) 
        {
            TypeInformation typeInformation = null; 
            object typeInformationObject = typeNameCache[type];
            if (typeInformationObject == null)
            {
                typeInformation = new TypeInformation(DataContract.GetClrTypeFullNameUsingTypeForwardedFromAttribute(type), DataContract.GetClrAssemblyName(type)); 
                lock (typeNameCache)
                { 
                    typeNameCache[type] = typeInformation; 
                }
            } 
            else
            {
                typeInformation = (TypeInformation) typeInformationObject;
            } 
            return typeInformation;
        } 
    } 

} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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