The **&quot;obj&quot; folder** is used to store temporary object files and other files used in order to create the final binary during the compilation process.

The **&quot;bin&quot; folder** is the output folder for complete binaries (assemblies).

In addition to [splattne&#39;s answer][1], I believe the *reason* for having it (and not cleaning it up after the build) is to support incremental compilation. If you&#39;ve already compiled 100 classes and change one of them, it&#39;s much more efficient to just recompile the code for the one changed class and reassemble the exe/dll from a mixture of the new and old code.

Of course, incremental compilation is a lot more complex than just that - it has to keep track of everything so it can detect when it needs to recompile a class even if that class itself hasn&#39;t changed. (e.g. if a new overload becomes available in a class - some callers may need to be recompiled.)


  [1]: https://stackoverflow.com/questions/233081/whats-the-obj-directory-for-in-net#233085

I would like to know who is locking a file (win32). I know about [WhoLockMe][1], but I would like a **command-line tool** which does more or less the same thing.

I also looked at [this question][2], but it seems only applicable for files opened remotely.


  [1]: http://www.dr-hoiby.com/WhoLockMe/
  [2]: https://stackoverflow.com/questions/208283/is-it-possible-to-programatically-find-out-what-process-is-locking-a-file-acros

Command-line tool for finding out who is locking a file

I just realized from an article in CACM that Doxygen works with Java (and several other languages) too. But Java has already the Javadoc tool. Can someone explain what are the pros and cons of either approach? Are they mutually exclusive? Is there a Maven plugin for Doxygen?

Doxygen vs Javadoc

What exactly is the purpose of the &#39;obj&#39; directory in .NET?

What&#39;s the &#39;obj&#39; directory for in .NET?

<p>What exactly is the purpose of the 'obj' directory in .NET?</p>


In my experience it seems that most people will tell you that it is unwise to force a garbage collection but in some cases where you are working with large objects that don&#39;t always get collected in the 0 generation but where memory is an issue, is it ok to force the collect?  Is there a best practice out there for doing so?

Best Practice for Forcing Garbage Collection in C#

I use an anonymous object to pass my Html Attributes to some helper methods.
If the consumer didn&#39;t add an ID attribute, I want to add it in my helper method.

How can I add an attribute to this anonymous object?


Add property to anonymous type after creation

I have the following code:

    MemoryStream foo(){
        MemoryStream ms = new MemoryStream();
        // write stuff to ms
        return ms;
    }

    void bar(){
        MemoryStream ms2 = foo();
        // do stuff with ms2
        return;
    }

Is there any chance that the MemoryStream that I&#39;ve allocated will somehow fail to be disposed of later?  

I&#39;ve got a peer review insisting that I manually close this, and I can&#39;t find the information to tell if he has a valid point or not.

Is a memory leak created if a MemoryStream in .NET is not closed?

How do you create an application shortcut (.lnk file) in C# or using the .NET framework?

The result would be a .lnk file to the specified application or URL.

Creating application shortcut in a directory

What is the best way to check for the existence of a session variable in ASP.NET C#?  

I like to use `String.IsNullOrEmpty()` works for strings and wondered if there was a similar method for `Session`.  Currently the only way I know of is:

     var session;
     if (Session[&quot;variable&quot;] != null)
     {
         session = Session[&quot;variable&quot;].ToString();
     }
     else
     {
         session = &quot;set this&quot;;
         Session[&quot;variable&quot;] = session;
     }

What is the best way to determine a session variable is null or empty in C#?

I have a web application that requires a server based component to periodically access POP3 email boxes and retrieve emails. The service then needs to process the emails which will involve:

  - Validating the email against some business rules (does it contain a valid reference in the subject line, which user sent the mail, etc.)
  - Analysing and saving any attachments to disk
  - Take the email body and attachment details and create a new item in the database
  - Or update an existing item where the reference matches the incoming email subject line

What is the best way to approach this? I really don&#39;t want to have to write a POP3 client from scratch, but I need to be able to customize the processing of emails. Ideally I would be able to plug in some component that does the access and retrieval for me, returning arrays of attachments, body text, subject line, etc. ready for my processing...

**[ UPDATE: Reviews ]**

OK, so I have spent a fair amount of time looking into (mainly free) .NET POP3 libraries so I thought I&#39;d provide a short review of some of those mentioned below and a few others:

  - [Pop3.net][1] - free - works OK, very basic in terms of functionality provided. This is pretty much just the POP3 commands and some base64 encoding, but it&#39;s very straight forward - probably a good introduction
  - [Pop3 Wizard][2] - commercial / some open source code - couldn&#39;t get this to build, missing DLLs, I wouldn&#39;t bother with this 
  - [C#Mail][3] - free for personal use - works well, comes with Mime parser and SMTP client, however the comments are in Japanese (not a big deal) and it didn&#39;t work with SSL &#39;out of the box&#39; - I had to change the SslStream constructor after which it worked no problem
  - [OpenPOP][4] - free - hasn&#39;t been updated for about 5 years so it&#39;s current state is .NET 1.0, doesn&#39;t support SSL but that was no problem to resolve - I just replaced the existing stream with an SslStream and it worked. Comes with Mime parser.

Of the free libraries, I&#39;d go for C#Mail or OpenPOP.

I looked at a few commercial libraries: [Chillkat][5], [Rebex][6], [RemObjects][7], [JMail.net][8]. Based on features, price and impression of the company I would probably go for Rebex and may in the future if my requirements change or I run into production issues with either of C#Mail or OpenPOP.

In case anyone&#39;s needs it, this is the replacement SslStream constructor that I used to enable SSL with C#Mail and OpenPOP:

    SslStream stream = new SslStream(clientSocket.GetStream(), false,
			         delegate(object sender, X509Certificate cert,
				     X509Chain chain, SslPolicyErrors errors) { return true; });

  [1]: http://weblogs.shockbyte.com.ar/rodolfof/archive/2008/07/07/pop3.net-library.aspx
  [2]: http://www.componentsource.com/products/seekford-net-pop3-wizard/index.html
  [3]: http://www.codeplex.com/csharpmail
  [4]: http://sourceforge.net/projects/hpop/
  [5]: http://www.chilkatsoft.com/
  [6]: http://www.rebex.net/
  [7]: http://remobjects.com/
  [8]: http://tech.dimac.net/default2.asp?M=Products/MenuDOTNET.asp&amp;P=Products/JMaildotnet/start.htm


Integrating POP3 client functionality into a C# application?

How can I replace Line Breaks within a string in C#?

Content Type	Original Author	Original Content on Stackoverflow
Question	Andrew Jones	View Question on Stackoverflow
Solution 1 - C#	splattne	View Answer on Stackoverflow
Solution 2 - C#	Jon Skeet	View Answer on Stackoverflow

What's the 'obj' directory for in .NET?

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Doxygen vs Javadoc

Command-line tool for finding out who is locking a file

Attributions