So while looking through a dump, you will sometimes come across an IP Address.  For example, the System.Net.IPAddress: If you look at this output, you can see that we have the address in the m_Address field, but what is 1895899146?  This is...

So in a previous post, we talked about Understanding when to use a Finalizer in your .NET class so now lets take a look at what the Finalize queue looks like and how to tell if things are bad. The command we use is !finalizequeue in sos: 0:010>...

A common problem we see when moving to .NET all revolves around the finalizer.  There are a few reasons that this happens: Developers move from C/C++ to C# and are used to created classes with a constructor and destructor. Developers don’t understand...

We recently had a case where the customer was having performance problems. They were seeing requests take a few minutes to return and didn’t know what was happening. So they took some dumps while the problem was happening. So we ran this dump through...

So we recently came across an issue where Visual Studio 2005 and 2008 Designers were not respecting assembly binding redirection. Scenario We have a file which is now version 2 and stored in the GAC .  So the assembly version is 2.0.0.0.  We...

There have been a number of reports of networking issues after installing SP2 for Windows Server 2003.  We now have a fix that will address these.  The errors you may see include: When you try to connect to the server by using a VPN connection...

Microsoft research recently released a new tool to help developers with Ajax applications.  You can check out the site for more information, Ajax View . This is some really cool technology that basically puts a proxy in between the server and the...

So it was kind of a trick question posting both of these errors.  They both mean the same thing.  Basically this is the error you get in SOS when the .NET Framework isn’t loaded in the process yet.   Problem 1 is from a SOS used to...

There have been a lot of rumors around Microsoft coming out with something that is Software + Services.  So at the Web 2.0 conference, we finally announced Live Mesh . Check out this Intro post for a bunch of the details.  This also mentioned...

If you try to make an asynchronous call, you will notice that the thread that executes the call doesn't run under the same account as the thread that called it, assuming you are using impersonation. There are a number of ways to change this if you would...

Problem Description So this is a customer situation we found were the customer was getting an System.OutOfMemoryException.  We were able to reproduce this with a console application that just ran: For Iterator = 0 To 99999999999 Regex.IsMatch(CONNECTION_STRING...

Problem 1 So here is the scenario.  You open a dump from when you were experiencing a problem and try to run an SOS command and you see: 0:024> !dumpheap -stat Cannot get the ThreadStore, do you have symbols for the mscorwks/mscorsvr files...

So there is a common issue that people run across when they start trying to debug managed code.  How does the heap compare to the current threads that are running? For example, here is an exception that we have found in the managed heap running ...

So we have a bunch of debugger extensions that we need to use depending on the situation.  So here are the extensions that can depend on various situations and when to use which.  The first thing to decide is to load the right DLL for the Framework...

A common issue we see customers having is after installing ASP.NET 2.0, the ASP.NET Tab is missing from IIS. This tab is used for setting the version of ASP.NET and a lot of other things. When this tab is missing, it can be rather difficult to get it...

Here is a question that was asked on my posting trying to invite questions, Got a question- Get an answer here . Question Something that would be handy straight from the team is how to handle ASP.NET (2 and later) form events when a Master page is added...

So I tend to describe a lot of issues here, but we had some really great conversation in our blog chat.  So I thought I would ask for questions from everyone.  Feel free to ask anything you like.  If it is a simple, quick answer, I’ll answer...

Here is yet another command you may not be aware of.  But it can be really helpful when you are troubleshooting many types of issues with IIS/ASP.NET. !clientconns is part of a debugger extension that ships with DebugDiag .  In the directory...

Here is another debugger command that you may not know about that is in the sos.dll file included with the debugger package for .NET 1.0 and .NET 1.1. !procinfo will print out the environment variables, CPU times and memory usage statistics.  This...

This post is a list of books that I would suggest people to read.  I will continue to add to this list, also, if you are using IE8, the list itself is a webslice.   Recommended ASP.NET Books Debugging Microsoft .NET 2.0 Applications Programming...

We get this problem from time to time so I thought I would talk about what to do when the performance counters are missing for ASP.NET. Method 1 The first piece of advice is to upgrade to the latest version of the framework, so the latest Service Pack...

During our recent blog chat, there were a number of topics that were asked about and I am going to expand on some of them.  The first one is the memory limits for different processes. This really depends on a few different things.  The architecture...

So the last quiz asked about a common error message you may see when debugging a dump from .NET on a machine other then where the dump was captured.  Now I want to go into more detail on this. For a look at the quiz, check out POP QUIZ- SOS not loading...

So this was a multi-part quiz.  The answers to the 4 questions posed are: What is going on here? We are trying to load the mscordacwks file that corresponds with the dump.  If we are unable to load this file, sos won’t work.  This...

So for this quiz, we are going to be looking at attempting to load sos.dll for the .NET Framework 2.0. We get a dump file, and when we try to run a command on the dump file, we get an error like: So reading this, we see that we should run .cordll -ve...