Brad Abrams
Design Guidelines, Managed code and the .NET Framework
April 2003 - Posts
Head cheese at MSDN joines the blog ranks
From the looks of Sara’s comments many of you have already found her site . I have worked with Sara for a long time… she has great passion for developer customers and partners. She had a huge impact of the . NET Framework and as you can see she is having
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Lutz joins the ranks
Lutz Roeder gets a blog.. Lutz is working a very cool product that uses some of my stuff and a lot of ChrisAn's stuff... He is also author of some very popular .NET tools ... Check it out..
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Docs on the GC
We had a little thread internally on some good docs on how the GC works... These were the most popular whitepapers... http://msdn.microsoft.com/msdnmag/issues/1100/GCI/default.aspx http://msdn.microsoft.com/msdnmag/issues/1200/GCI2/
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You don't know till you measure!
If you are serious about getting the best performance possible out of a managed app, you need to be using a profiler. The devs that designed and wrote the CLR still need to use a profiler to judge how to improve the performance of a managed app.. Answer
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More on String.Empty
Deepak Sharma asks : Where does String.Length == 0 stands in terms of memory efficiency compared to these two methods? Any ideas. I chatted with the Dev lead that owns String… here is his response: Actually, there is no memory effect here. There is always
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Memory Leaks in Managed code
Q: Can you have memory leaks in managed code? If so, how can you catch them? A: (From the GC Architect) GC will typically reclaim objects at its own pace, based on balancing available memory and runtime overhead. If an assembly is terminated and it is
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fxcop command line example
I noticed someone hit my site from a google search on this topic. My guess is they didn't find out what they needed, so I thought i'd post a complete answer just in case someone else comes looking for it.. From Michael Fanning the Dev lead for FxCop...
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More from the Interop Queen
Sonja just told me she had another episode posted... I have not watched it yet, but I am sure it is good. http://msdn.microsoft.com/msdntv/episode.aspx?xml=episodes/en/20030424NETFXSK/manifest.xml Platform Invoke Tips & Tricks: Memory Ownership and
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Space Invaders Screen Shot
Chris asks for a picture… finally got it … Long live command line apps!
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Chris, Chris, Jeff and Jeff
I caught Jeffrey Richter and Chris Sells posing with their doppelgangers the other day on the 4th floor of building 42..
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Some great stuff published today
Rico is one of the smartest guys on the CLR team and he is super, super passionate about performance. He is looking at everyway possible to make managed code run faster... He just posted a great whitepaper on how the GC works and how to get the best perf
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A new CLR guy in the house
Please welcome Adam Nathan . Adam is a test lead on the CLR team and knows everything there is to know about interop between managed code and unmanaged code. In fact he even wrote the book on the subject. I am sure you will find his blog a very useful
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DateTimeFormating
Well, with a lead in like that I could not help but post. This sample comes from a f riend of mine working who is helping me with a little book project... using System; using System.Globalization; namespace Samples { public class DateTimeFormatInfoSample
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String.Empty vs ""
As David implies , there difference between String.Empty and “” are pretty small, but there is a difference. “” actually creates an object, it will likely be pulled out of the string intern pool, but still… while String.Empty creates no object… so if
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Assembly/DLL Naming Guidelines
I have not seen this be much of debate externally, but it has been pretty hotly debated internally. We just closed down on this guideline... As always, your comments are welcome: 2.3.4 Assembly/DLL Naming Guidelines An assembly is the unit of deployment
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Did a short MSDN TV Spot today...
Erica Wiechers from the .NET Show fame came by my office today and shot a short segment for MSDN TV about how the GC works and the Dispose pattern . I thought it went fairly well. I was impressed at how quick it went, it was so easy to get it scheduled
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Console Magic
I know, I know, you just got your hands on Everett , but I thought I’d start wetting your appetite for Whidbey (the next release of the . NET Framework and Tools)… As I see cool Whidbey demos I’ll let you know about them…. This one really brought back
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User groups in the Research Triangle Park Area?
I’ll be in North Carolina towards the end of May…. Anyone involved in a user group (or some such) that would like a presentation on what is new in the CLR or just want to chat about how the CLR could be better? I figure I have room for exactly one of
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Like a breath of fresh air
I can’t believe it, just last week I was pulling great content from internal aliases and posting them here. Now Chris Brumme is actively blogging his OWN stuff and, even better, referring that same internal alias to his public blog. We are starting to
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On System.Enum and System.ValueType
Yup Shawn has it pretty much right on . Both System.Enum and System.ValueType are themselves reference types. We added them to the system for two primary reasons: 1. We wanted to provide developers an easy way to group all ValueTypes and all Enums in
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Retrieving the Fusion log
More from the dev that owns the loader... If the exception message isn’t enough for you to determine what the problem is, try getting the Fusion log. It will describe the binding failure (if this is due to an assembly binding failure, instead of a loading
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Use of AppDomain.Load()
More from inside the walls.. From the dev that owns the loader... AppDomain.Load() is only meant to be called on the current AppDomain (for use by Interop callers). If you call it on a different AppDomain, if the assembly successfully loads in the target
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Get the hresult from a managed exception
This comes up a lot on internal lists so I thought i'd share... from the FAQ: G et the hresult by calling System.Runtime.InteropServices.Marshal.GetHRForException() on the Exception object. If that info is not readily available, you may need to attach
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Chris Brumme in the house
Chris is a senior architect on the CLR team... He literally knows how and why everyting in CLR works the way it does. I know he will have great stuff to share... Please take a look! http://blogs.gotdotnet.com/cbrumme/
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Who's got the locks?
I just had a little fun playing around with SOS today... Here is a bit of mail from a dev on the CLR debugger team that makes this magic happen. If you are running V1.1 then you can use the SOS.dll that is in the Framework\v1.1.4322 folder under a Native
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Hashtable.Clear thread-safety?
Q: Is it safe for a single writer to call Hashtable.Clear() with multiple concurrent readers? A: (from the developer that owns Hashtable) It depends on what you want. Clear() will not cause a hashtable to be inconsistent state, so hashtable will be not
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On .NET DJ Reader's Choice
Well, I see Yasser and Ingo' s are linking to their books on .NETDJ Readers' Choice , so I thought I’d join them… I had the pleasure of doing the Libraries chapter and part of the intro for Programming in the .NET Environment . I’d love to hear what people
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Honest, it doesn't rain all the time..
I wasn’t sure recruiting via blogs was an acceptable thing to do our not, but if Don does it , it must be OK ;-) So here goes…. I have an opening for a Program Manager on my team designing features for the Base Class Libraries and helping me with the
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Implementing IEnumerable
Hot off the presses... What do you think? ..brad Implementing IEnumerable Almost all collections expose some way to enumerate elements it contains. The IEnumerable interface encapsulates this notion such that common facilities can be built that work on
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path to the executable
Another one that I have seen come up before... Q: How to find that path to the executable I am running in? A: Assembly.GetExecutingAssembly().Location
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Strings and IsNullOrEmpty
Jesse aks: >Tired of doing this: "if(s == null || s == String.Empty)"... Yea, we have heard that request before... here is a method we are looking at adding a the Whidbey release of the .NET Framework on the System.String class. public static bool
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VS 2003 IDE and .NET Framework 1.0
I actually had this question a couple of weeks ago when I was using an RC of VS 2003 to build an application for my wife who only has V1.0 of the Framework on her machine. She doesn't run beta software ;-). So when I saw it come across the internal aliases
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Implementing ICloneable
I was doing a little work on the Design Guidelines document tonight and I noticed this section that we added recently. I thought I'd post it here for your comments. Where are you using ICloneable today? Do you agree with this suggestion? 1.1 Implementing
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Why Strong Naming?
More from inside the walls: Q: Does anyone know why we’ve created two ways to sign the components? The certificate form covers all the needs I can see. I wonder why we have a separate “strong naming” manner to do signing that doesn’t cover all the security
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And the Winner is..
Looks like David Stone one out by under a minute… If John St. Clair had only hit “add” a little faster… David and John both hit the nail on the head.. here is David ’s response: Ø No... because in the second Format method, the format param is "{0}" and
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Support for /3gb in the CLR
It is true that the CLR in V1.1 does support /3gb memory address space option... Here is a quote from QA person that would know... 1.1 does support /3gb. (to use, mark your images as 3gb aware using imagectl or linker options. The only image that needs
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Quick C# Quiz
Will this code throw an AgrumentNullException? and why? string firstName = null; String.Format (“{0}”, firstName); Here is the for code String.Format , if that helps… public static String Format(String format, Object arg0) { return Format (null, format,
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On Dispose
Wallym has some good thoughts on the importance of calling dispose, which reminded me we have a complete whitepaper on how to implement dispose correctly... Love to have your feedback on it. White paper on Dispose
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More on BCL type names
Jeff read my recent post and suggested I include ALL his reasons for using the BCL name... Here are they are... 1. Devs think there is a difference between String and string or int and Int32 and there isn’t. For example, I’ve run into some people who
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Always more to learn
I am reviewing some samples for an upcoming reference book. The samples are for classes I know very well. I designed or helped design most of them. But I always have something to learn… Here is one that I thought was pretty cool… prints out the short
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To use the BCL type names or not?
Jeffrey Richter and I have an on going argument that I thought you’d like to chime in on. In samples, books, etc should we use the BCL type names (Int32, String, Single, etc) or programming language specific type names such as in C# (int, string, float,
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Conversion Operators
One of my many jobs here at MS is helping out with the .NET Framework Design Guidelines Document. Tonight I had to make a small tweak to a guideline I added last week so I thought while I was in there I would post it here to see if folks had comments.
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More on Changes for V1.1
We wrote a little program that does a "smart diff" of the .NET Framework... Internally we use it to watch out for breaking changes or making stuff public accidentally . Anyway, here is the output of the tool for V1.0 to V1.1 http://www.gotdotnet.com/team/upgrade/apiChanges.asp
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AppDomains for sandboxing/robustness
Another internal thread I thought i'd share... Q: I want to sandbox objects of certain types that will be running in my process so that if anything in these objects crashes for any reason, code in the other objects continue to execute. I’m assuming AppDomains
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Are assignment of 4-byte quantities guaranteed atomic in the CLR?
We had a little thread on this internally today and I thought it interesting enough to share here. I am just experimenting here – is this type of thing useful? Q: If I do simple Int32 assignment to a shared variable in a CLR multi-threaded app, do I need
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More on the Console form the internet zone
In a commnet on one of my posts , Brad, Guy of .NET asks why we would turn this off. Well, bottom line it is that we can't come up with a meaningful scenario for using the console from semi-trust and there is clearly some level of risk is exposing it.
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With V1.1 of the Framework shipping
I though i'd post a couple of links I have found useful.. DennisAn wrote a great whitepaper on how to target different runtime versions... http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnnetdep/html/sidexsidenet.asp And if you want
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Using Console from the internet zone
Does anyone have a scenario where you are using System.Console from the internet zone? We are trying to understand if we should continue to enable using Console from the internet zone in Whidbey. Are there any scenarios that benefit from using Console
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The CLI\C# gets ISO blessed
Very cool! ISO has always been the goal... nice to see we made it. http://msnbc-cnet.com.com/2100-1007-995108.html?type=pt&part=msnbc&tag=alert&form=feed&subj=cnetnews
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Why Blog
Why Blog they ask… I believe that Microsoft has benefited greatly from the enormous community support that is available for the .NET Framework. I have been thinking for a while about how I can best contribute to that community. I spend some time on the
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Books by Brad Abrams
Framework Design Guidelines : Conventions, Idioms, and Patterns for Reusable .NET Libraries
.NET Framework Standard Library Annotated Reference, Volume 2
.NET Framework Standard Library Annotated Reference, Volume 1
Base Class Library Reference Poster
Programming in the .NET Environment
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