Error on DataContractAttribute, IExtensibleDataObject, ExtensionDataObject

Question

I got this error on my win forms 'system.Runtime.Serialization.DataContractAttrubute is not defines' same for 'IExtensibleDataObject, ExtensionDataObject'

I have the following in my app,

Imports System
Imports System.Runtime.Serialization

What I did was, I have a web service and I want to debug it, and its easier in a win form app. I copied the code and copied the web reference.

I don't know why this happens.

C# help also welcome

Answer 1

You are probably missing a reference to the System.Runtime.Serialization (.NET) assembly. Add it to your project as a reference and it should be all good.

You can also see this in the documentation (MSDN), that DataContractAttribute, ExtensionDataObject and IExtensibleDataObject are defined in the System.Runtime.Serialization.dll assembly.

• http://msdn.microsoft.com/en-us/library/system.runtime.serialization.datacontractattribute.aspx
• http://msdn.microsoft.com/en-us/library/system.runtime.serialization.extensiondataobject.aspx
• http://msdn.microsoft.com/en-us/library/system.runtime.serialization.iextensibledataobject.aspx

Add it to your project reference: go to your project properties, tab "References" and press "Add", go to the tab ".NET" and look for "System.Runtime.Serialization". Now you should be good to go.