自动生成的代码在Visual Studio 2015中引发很多警告

Question

I recently upgrade my visual studio from 2013 to 2015. now when I open my projects I see so many warning in auto generated code with code CA2235.

Here is one of the warnings:

Warning CA2235 Field extensionDataField is a member of type WebServiceInputTrafficFinesInquiry which is serializable but is of type System.Runtime.Serialization.ExtensionDataObject which is not serializable

SimpayRobot C:\\Users\\Admin\\Desktop\\Projects\\SimpayRobot_SVN\\trunk\\SimpayRobot\\SimpayRobot\\Service References\\RahvarService\\Reference.cs 22

All fields that cannot be serialized directly should have the NonSerializedAttribute. Types that have the SerializableAttribute should not have fields of types that do not have the SerializableAttribute unless the fields are marked with the NonSerializedAttribute.

The project works just fine but it makes programming uncomfortable. I don't know what to do. It is auto generated code and I don't want edit it.

How can I get rid of these warnings? One more thing: warnings are because of a soap service reference I added to the project.

UPDATE: I don't want to suppress the warning! Why should I do it? I want solve the problem.

Here is line 22:(It is part of the auto generated code.)

[System.NonSerializedAttribute()]
private System.Runtime.Serialization.ExtensionDataObject extensionDataField;

Answer 1

I ran into the same problem when I started checking my source code with FxCops. Starting my investigation with this post it seems that the CA2235 warnings in reference.cs (automatically generated by WCF-services) are classified as an issue that will be solved in Visual Studio Update 3 (see this link https://github.com/dotnet/roslyn/issues/3898 for further information)

Regards JRB

Answer 2

Type of your field/property ExtensionDataObject is not serializable, but it's part of the class which is marked as serializable .

You should either mark your ExtensionDataObject as Serializable , or decorate with with NonSerializedAttribute .

For an example if you try to store your object in a session, it will not be able to serialize all of it's properties, and it could throw an exception.

Answer 3

Have a deeper look at the warning. It tells you that a Field is (probably implicitly) marked as serializable, while its type is not serializable. It tells you to add [NonSerialized] to that filed.

You can work this out like that (im just guessing what your code might look like):

[Serializable]
public class WebServiceInputTrafficFinesInquiry 
{
    // ...

    [NonSerialized]
    ExtensionDataObject extensionDataField;

    // ...
}

See https://msdn.microsoft.com/en-us/library/ms182349.aspx for more information.