NetDataContractSerializer.WriteStartObject Method (XmlDictionaryWriter, Object)

Writes the opening XML element using an XmlDictionaryWriter.

Namespace: System.Runtime.Serialization
Assembly: System.Runtime.Serialization (in system.runtime.serialization.dll)

public override void WriteStartObject (
	XmlDictionaryWriter writer,
	Object graph
public void WriteStartObject (
	XmlDictionaryWriter writer, 
	Object graph
public override function WriteStartObject (
	writer : XmlDictionaryWriter, 
	graph : Object
Not applicable.



The XmlDictionaryWriter used to write the XML element.


The object to serialize. All child objects of this root object are automatically serialized.

Exception typeCondition


the type being serialized does not conform to data contract rules. For example, the DataContractAttribute attribute has not been applied to the type.


there is a problem with the instance being serialized.


the maximum number of object to serialize has been exceeded. Check the MaxItemsInObjectGraph property.

The following example creates an object to serialize, an instance of the NetDataContractSerializer, and an instance of the XmlDictionaryWriter class. The example uses the WriteStartObject, WriteObjectContent, and WriteEndObject methods to write the object data into the XML document.

public sealed class ShowWriteStartObject

    public static void WriteObjectData(string path)
        // Create the object to serialize.
        Person p = new Person("Lynn", "Tsoflias", 9876);

        // Create the writer.
        FileStream fs = new FileStream(path, FileMode.Create);
        XmlDictionaryWriter writer =

        NetDataContractSerializer ser =
            new NetDataContractSerializer();

        // Use the writer to start a document.

        // Use the serializer to write the start of the 
        // object data. Use it again to write the object
        // data. 
        ser.WriteStartObject(writer, p);
        ser.WriteObjectContent(writer, p);

        // Use the serializer to write the end of the 
        // object data. Then use the writer to write the end
        // of the document.


        // Close and release the writer resources.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0