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Memory Models: Understand the Impact of Low-Lock Techniques in Multithreaded Apps

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net

Because the use of low-lock techniques in your application significantly increases the likelihood of introducing hard-to-find bugs, it is best to use them only when absolutely necessary. Here Vance Morrison demonstrates the limitations and subtleties low-lock techniques so that if you are forced to use them you have a better chance of using them correctly.

Vance Morrison

MSDN Magazine October 2005

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Debug Leaky Apps: Identify And Prevent Memory Leaks In Managed Code


When is the .NET Garbage Collector unable to reclaim memory? The answer might surprise you. Stay tuned.

James Kovacs

MSDN Magazine January 2007

WCF Essentials: Discover Mighty Instance Management Techniques For Developing WCF Apps


Instance management refers to a set of techniques used by Windows Communication Foundation to bind a set of messages to a service instance. This article introduces the concept and shows you why you need instance management.

Juval Lowy

MSDN Magazine June 2006

No More Hangs: Advanced Techniques To Avoid And Detect Deadlocks In .NET Apps


You can combat deadlock using a combination of disciplined locking practices which Joe Duffy aptly explains in this article.

Joe Duffy

MSDN Magazine April 2006

Concurrency: What Every Dev Must Know About Multithreaded Apps


Multithreading offers lots of benefits, but it's not a technique you can employ willy nilly without first learning about all the potential pitfalls. To get you started, Vance Morrison covers multithreading and the shared memory threading model, race conditions and how concurrent access can break invariants. He also discusses how to use locks so you can understand the costs involved.

Vance Morrison

MSDN Magazine August 2005

App Lockdown: Defend Your Apps and Critical User Info with Defensive Coding Techniques


Whether you're storing database connection strings, user credentials, or logon info, you'll need to practice good defensive programming techniques to avoid those surprise situations in which your data is exposed. In this article, author Kenny Kerry shows you how.

Kenny Kerr

MSDN Magazine November 2004

Virus Hunting: Understand Common Virus Attacks Before They Strike to Better Protect Your Apps


Developer's machines can often be more vulnerable to viruses than the average corporate user because of their more frequent access to remote machines and shares, and the differing administrative privileges they maintain across mutiple machines. Reliance on antivirus software is fine as a first line of defense, but you need a basic arsenal of skills for securing the executables on your system and coping with viruses on your own. This article reviews proactive methods you can use to defend yourself against malicious executable code in resources, component libraries, scripts and macros, as well as how to avoid a handful of other potential vulnerabilities.

Jason Fisher

MSDN Magazine May 2003

lock page in memory


Hi All,

Can any one tell me what is the lock page in memory.what the purpuse of this and how can we can do that??


Pawan Singh




Serving Silverlight Apps from Windows Mobile

Even if mobile dev is not my every day work, thanks to the .Net Compact Framework, it's still .Net programming.

Here is the scenario:

You come back home, you have a windows mobile phone wifi capable and you want to quickly get access to your phone pictures from your home network.
You just activate the Wifi, run my app and then browse to the provided link from any computer on the network.

Practical Multithreading for Client Apps

Writing applications that use multiple threads is often considered an advanced programming task, prone to errors. In this month's column, I'll focus on a practical application of multithreading in Windows® Forms applications with some real benefits, while attempting to keep things simple. My goal is to present multithreading in an approachable way that addresses a very common need: writing applications with a user interface that remain responsive to the user.

How to detect and avoid memory and resources leaks in .NET application

Despite what a lot of people believe, it's easy to introduce memory and resources leaks in .NET applications. The Garbage Collector, or GC for close friends, is not a magician who would completely relieve you from taking care of your memory and resources consumption.

I'll explain in this article why memory leaks exist in .NET and how to avoid them. Don't worry, I won't focus here on the inner workings of the garbage collector and other advanced characteristics of memory and resources management in .NET.

Best Coding Techniques To Improve Performance for SharePoint Applications

As more developers write custom code by using the SharePoint Object Model, they encounter common issues that can affect application performance.

The following areas reflect the main issues encountered by developers as they write custom code by using the SharePoint object model:

§ Disposing of SharePoint objects

§ Caching data and objects

§ Writing code that is scalable

could somebody give me example how I can connect to database only once if I use many models in contr


I use in my ASP.NET MVC application repository pattern and I use in controller for example 3 models:

   namespace MvcApplication1.Controllers  
        public class HomepageController : Controller  
            private IWebsitesRepository _repository_websites = new WebsitesRepository();  
            private IFirmRepository _repository_firm = new FirmRepository();  
            private IPhotosRepository _repository_photos = new PhotosRepository();  

In WebsiteRepozitory, FirmRepository and PhotosRepository classes I have:

Database1Entities _entities = new Database1Entities();

So I have 3 connections to database ? Is it wrong ? How can I solve it ?

file upload in chunks or not buffering in memory before writing to disk?


What are the options for handling file uploads to reduce the memory footprint?  Is there a way to upload in chunks?  Is there a way to stream upload directly to disk instead of loading entire file in server memory?


Visual Studio 2008 Memory problems


My memory in task manager reaches about 900,000K  and I don't know why it does this. Definately slows everything down, especially when I rebuild my tableAdapters, takes about 30 seconds sometimes to rebuild the project.

iPhone and mobile apps


Hi Guys,


I would like to develop a mobile application such as the one you find in iPhones but I don't know from where to start!!? I'm not looking for something complicated, just an a static application of an eBook that users can read an flip the pages, I don't think that you can do such animation easily in ASP.net so does anyone knows what tool that I can use to develop such application?






Need To Create A Mobile App for All Mobile's Models, No WAP Browser Intrection


Hi all,

I have an assignment to develop a mobile application for My company's customers (around 250000). its could be download from our website or we can also provide to our customers those are visiting our branches, on their demand.


1- this application should execute/compatible with all kind off mobile phone (Nokia, Samsun, LG, Motrola, Black Berry, iPhone..... every one). when it install on customer phone it will provide some certian option under the my company Icon to the user, like:

         1- Help Line Numbers

         2- Branches Address/Details

         3- My Last Visit Informations.

         4- My Next Appointment.

         5- My Payment History   and more etc etc......

         the user will select any one option and then get the response by return text Message against the option he selected from our Site/Service (I dont konw what we will say this system who will response to the customers)

My Problem is that I saw/Check many fourms and articals they are giving the tips/det

Crystal Report gives System.AccessViolationException: Attempted to read or write protected memory. T


when a crystal report for same id is opened again at same time or refreshed then it gives the

"System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt."

Stack Trace is :-

Stack Trace:

[AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.]
CrystalDecisions.ReportAppServer.Controllers.DatabaseControllerClass.SetConnectionInfos(ConnectionInfos ConnectionInfos) +0
CrystalDecisions.CrystalReports.Engine.Table.ApplyLogOnInfo(TableLogOnInfo logonInfo) +362
CrystalDecisions.CrystalReports.Engine.ReportDocument.SetTableLogon(Tables tables, String user, String password, String server, String database, Boolean ignoreCase) +258
CrystalDecisions.CrystalReports.Engine.ReportDocument.SetDatabaseLogon(String user, String password, String server, String database, Boolean ignoreCase) +204
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