DataContractSerializer.WriteObject Method (XmlWriter, Object)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Writes all the object data (starting XML element, content, and closing element) to an XML document or stream with an XmlWriter.

Namespace:  System.Runtime.Serialization
Assembly:  System.Runtime.Serialization (in System.Runtime.Serialization.dll)


Public Overrides Sub WriteObject ( _
    writer As XmlWriter, _
    graph As Object _
public override void WriteObject(
    XmlWriter writer,
    Object graph


  • graph
    Type: System.Object
    The object that contains the data to write to the stream.


Exception Condition

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 written.


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


Platform Notes

Silverlight for Windows Phone Silverlight for Windows Phone

WriteObject(XmlWriter, Object) fails when it tries to serialize an inner type that contains a type derived from Dictionary<TKey, TValue> because open generics are not supported.

Version Information


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0


For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.