Bug 3593 - XmlSerializer with derived classes and no default constructor in the base class returns error
Summary: XmlSerializer with derived classes and no default constructor in the base cla...
Status: RESOLVED FIXED
Alias: None
Product: Class Libraries
Classification: Mono
Component: System.XML ()
Version: unspecified
Hardware: PC Windows
: Normal normal
Target Milestone: Untriaged
Assignee: marcos.henrich
URL:
Depends on:
Blocks:
 
Reported: 2012-02-22 13:18 UTC by brian bonnett
Modified: 2014-08-25 11:42 UTC (History)
4 users (show)

Tags:
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED FIXED

Description brian bonnett 2012-02-22 13:18:43 UTC
XmlSerializer behaves differently in the Mono for Android version than normal 4.0 mono, .net, or .net for windows phone.

If you serialize a derived class that has a default constructor but the base class does not have a default constructor, the runtime throws an InvalidOperation exception with no details.

In other versions of .NET this serializes fine.   Since a default constructor is the norm when serializing, the bug may be in all other versions of the framework.

// Exception throw here
XmlSerializer ser = new XmlSerializer(derived.GetType());
Comment 1 mlpstingray 2013-08-28 16:50:38 UTC
I've got the same problem. 

In my case my base class is Generic and Abstract while my Derived class does not have default constructor, it crashes on this line.

var ser = new XmlSerializer(typeof(T));

That probably confirm the problem and narrow it to the derived default constructor missing.
Comment 2 marcos.henrich 2014-08-25 11:42:57 UTC
Hi Brian,

Thank you for the bug report.

The problem was fixed in master by the following commit.

https://github.com/mono/mono/commit/8fa4a77948fb64f90c56ad191b98e0cf4cf87614