Is XML Object deserialization also dynamically compiled?

Today, we encountered a very strange problem that cannot be reproduced.

Deserializes an object from an XML file during class construction. Generally, it is good. In rare cases, problems may occur.

System. runtime. interopservices. externalexception: Timed out waiting for a program to execute. The command being executed was "C: \ WINDOWS \ microsoft.net \ framework \ v1.1.4322 \ csc.exe"/noconfig @ "C: \ police ~ 1 \ montaq ~ 1 \ locals ~ 1 \ temp \ prfmes01.20.line ".
At system. codedom. compiler. executor. execwaitwithcaptureunimpersonated (intptr usertoken, string cmd, string currentdir, tempfilecollection tempfiles, string & outputname, string & errorname, string truecmdline)
At system. codedom. compiler. executor. execwaitwithcapture (intptr usertoken, string cmd, string currentdir, tempfilecollection tempfiles, string & outputname, string & errorname, string truecmdline)
At system. codedom. compiler. codecompiler. Compile (compilerparameters options, string compilerdirectory, string compilerexe, string arguments, string & outputfile, int32 & nativereturnvalue, string trueargs)
At system. codedom. compiler. codecompiler. fromfilebatch (compilerparameters options, string [] filenames)
At system. codedom. compiler. codecompiler. fromsourcebatch (compilerparameters options, string [] sources)
At system. codedom. compiler. codecompiler. fromsource (compilerparameters options, string source)
At system. codedom. compiler. codecompiler. system. codedom. compiler. icodecompiler. compileassemblyfromsource (compilerparameters options, string source)
At system. xml. serialization. compiler. Compile ()
At system. xml. serialization. tempassembly... ctor (xmlmapping [] xmlmappings)
At system. xml. serialization. xmlserializer .. ctor (type, string defaultnamespace)
At system. xml. serialization. xmlserializer .. ctor (type)
At xmlstate .. ctor (string path)
At autoupdateingaddin. Updater .. ctor (string hostappexefullpath)
At autoupdateingaddin. form1.checkupdate ()
At autoupdateingaddin. form1.form1 _ load (Object sender, eventargs E)
At system. Windows. Forms. Form. onload (eventargs E)
At system. Windows. Forms. Form. oncreatecontrol ()
At system. Windows. Forms. Control. createcontrol (Boolean fignorevisible)
At system. Windows. Forms. Control. createcontrol ()
At system. Windows. Forms. Control. wmshowwindow (Message & M)
At system. Windows. Forms. Control. wndproc (Message & M)
At system. Windows. Forms. scrollablecontrol. wndproc (Message & M)
At system. Windows. Forms. containercontrol. wndproc (Message & M)
At system. Windows. Forms. Form. wmshowwindow (Message & M)
At system. Windows. Forms. Form. wndproc (Message & M)
At system. Windows. Forms. controlnativewindow. onmessage (Message & M)
At system. Windows. Forms. controlnativewindow. wndproc (Message & M)
At system. Windows. Forms. nativewindow. Callback (intptr hwnd, int32 MSG, intptr wparam, intptr lparam)

XML file inconvenience,ProgramAnd sometimes there will be such errors.

This error indicates that dynamic compilation is called during object deserialization.CodeAnd then compile and execute. Hoho, the intermediate results are all placed in the temp file. When the execution ends, delete it.

Verify it with reflector. (Y)

To test, I write a simple deserialization program.

Create a class

Using System;
Using System. xml;
Using System. xml. serialization;

Namespace Xmldemo
{

[Xmlroot ( " Person " , Namespace = "" )]
Public   Class Person
{
[Xmlelement ("Personname")]
Public StringName;

Public IntAge;
}
}

Then I generate an instance of this class and write it into an XML file. The file content is as follows:

  <? XML version = "1.0" ?>  
- < Person Xmlns: XSD = "Http://www.w3.org/2001/XMLSchema" Xmlns: xsi = "Http://www.w3.org/2001/XMLSchema-instance" >
< Personname > Montaque </ Personname >  
< Age > 30 </ Age >  
</ Person >

Next is the deserialization class. Remember to reference system. runtime. serialization. dll.

The Code is as follows:

System. xml. serialization. xmlserializer XR = New System. xml. serialization. xmlserializer ( Typeof (Person ));
System. Io. filestream FS = New System. Io. filestream ( " C: \ test. xml " , System. Io. filemode. Open, system. Io. fileaccess. Read );
Person P = (Person) XR. deserialize (FS );
Console. writeline (P. Name );

The running result is correct.

During the running process, I used the file vendor to install csc.exe. He really made a CS in the middle and then compiled it...

For example