The little program that follows this post demonstrates a defect of the Clone method of the System.Collections.Queue class. The program twice prints two columns of strings: the elements of a queue and its clone. The first output shows the clone of a queue whose elements were enqueued but never ...more >>

Hi I have a scheduling application that runs several assemblies every 5 - 20 minutes. Assemblies to run are loaded from file dim a as [Assembly a = [Assembly].LoadFrom("assembly_file") then types that implement custom interface are found and executed in a new thread. When thread is finished I...more >>

Hi How does a .NET application know what version of the framework to use by default. For example I have framework version 1.0 and 1.1 on my machine. When I develope an App using VS.NET 2002 it uses framework 1.0. How does the app know it Is this info stored in the assembly REgards Srini...more >>

Continuing on my first post, I read this article today (mind the line breaks): http://www.theserverside.net/articles/article.aspx?l=GarbageCollection and in this article the author says that the Dispose method must be thread-safe. I'm going to assume that this is correct, and as such just...more >>

I read the following article this morning (mind the linebreaks): http://www.theserverside.net/articles/article.aspx?l=GarbageCollection This article concludes that you need a GC.KeepAlive inside a using clause in order to make sure the object you're using will stay alive until the using clau...more >>

Hi, Everyday when I try to build my solution I get the message that I am missing the assembly reference to the DSO dll. Then I have to execute the MS SQL Server 2000 Analysis Services SP3 again to retain the assembly reference for the DSO. Then I can work all day installing and uninstalling m...more >>

Hi, I've been doing some experiments to better understand threading within an app domain, and I have a couple of questions perhaps you guys could help me with... The MSDN docs point out that as long as there are foreground threads an application will not terminate. Although I can't find any me...more >>

Look at the following code : I instanciate a class which creates a new Thread in its .ctor. Then i set the instance of this class to null and let the GC run - but GC only cleans this instance up if I explicitly Start() and Abort() the thread .... I find that this is not the way one would ...more >>

Hi all I'm currently learning about Zero-touch deployment with WinForm apps, and I am trying to set up an app in Visual Studio .NET 2003 so that it will run with IEExec.exe to simulate the setup of an appropriate security environment for the application to run in The parameters for IEExec.exe ar...more >>

I am trying to accomplish something like this: (C# pseudocode) class MySample { IBigObject _value; Type _type; public IBigObject TheBigObject { get { if(_type!=null) { _value=(IBigObject)_type.GetConstructor(Type.EmptyTypes).Invoke(new object[0]); _type=null; ...more >>

Hello, I'm trying to get my brain around the CLR! Can somebody tell me if the following are correct? Thanks. 1. The CLR runs each managed application in its own application domain, but there can be several application domains within the same process. 2. The managed heap is shared by all a...more >>

Is it possible to get a Type reference to the currently executing type from a Static method? public class foo { public string static FooM() { Type x = ???? return "Crap"; } } public class foo2 { public string Something() { return "x"; } } then if callin...more >>

I know there have been a lot of posts in relation to GC, working set, trimming working sets, minimizing forms, etc. I've read every one I can find, but have not found a solution to my problem. The closest I ever found was the thread here recently "GC does not release memory... memory keeps growi...more >>

I'm guessing that NullReferenceExceptions are by far the most common exceptions thrown in .net. Why not add the type of the reference to the message? Have it say something like: Object reference of type 'string' not set to an instance of an object. This would really help when trying to figur...more >>

Can anyone recommend a good profiler for .NET? It should support both vb.net and c#. Thanks...more >>

I have a delegate which I call BeginInvoke on. I use the waithandle.WaitOne to wait for the delegate to finish. If there is an exception in the delegate call, waithandle.WaitOne returns true and the asyncresult.IsFinished(Completed) also returns true. How do I know if there is an exception and t...more >>

I encounter a strange problem using platform invoke using C#. The senario is this: I have a dll which uses a 3rd party static link library (lib). Inside the lib, there are some C structures defined by not exposed to user, in the dll, that data type can be treated as an opaque type. I use C# a...more >>

Hi all, Sorry for cross-posting. I have to convert a J2EE date as a long ("Millis") in a .NET date as a long ("Ticks") In Java, currentTimeMillis, is the difference, measured in milliseconds, between the current time and midnight, January 1, 1970 UTC. In .NET, DateTime.Ticks is the 10...more >>

Hi, it is my understanding that to support generics the CLR (at least the IL) had to be extended with new instructions. I have been wandering around the ms site looking for ducumentation without succses, can anyone point me in the right direction? thanks Ole...more >>

Hi I have been creating an Button using .Net C#. Once the user clicks the button, the click event handler will perform task A. This normally takes around 2 minutes During this 2 minutes, the user must not be allowed to click this button again However, once the user clicks multiple times on thi...more >>

I am trying to write a utility method/function in c# to resize an array, the problem I have encountered is how to safely get the Type of the items in the array, even when the array is empty. Here is how the code I wrote: public static Array Redim(Array a, int length) { Type type = a.Ge...more >>

Let me give a quick user story here: I need to be able to go from a byte offset in a method body to a line of source code reference. I need to do this statically, without the application being run in the debugger or otherwise. I would really like to do this with purely managed code. That bein...more >>

SciTech Software is pleased to announce that .NET Memory Profiler 2.0 has just been released. ..NET Memory Profiler is a powerful tool for finding memory leaks and optimizing the memory usage of .NET Programs. For more information see the .NET Memory Profiler web site at: http://www.scite...more >>

Hi Avon Last night I was able to duplicate your experiment with your sample classes with debug point at the parent class constructor On the stack dump, I did see the test class's main methos at the bottom of the stack, abov the Main mathod, it was childclass's constructor and then directly abov...more >>

Hello, We successfully compiled (on .NET 2003) and ran a MFC application using COM, and then we try to compile it with /clr switch on .NET 2003. The compilation is successful, but the MFC app failed to start with an error thrown "Cannot change thread mode after it is set..", when calling HRESULT...more >>

Hello friends, I am finishing my Computer Science graduation this year, and I have to make a final project for it. As I'm working with Microsoft .NET, my idea is to write my project about the MSIL. A software that will disassemble the .EXE (generated by VS.NET 2k3 without obfuscation), and ...more >>

With certain combinations of my app's dll's, my app fails at startup with the message ...\V1.1.4322\mscorwks.dll could not be loaded I do in fact have the .NET Framework 1.1 installed on my machine, and I can run other applications with it I have a feeling it has to do with my trying to lau...more >>

I have been attempting to find a way to [programmically] add printers to a server. This requires that a new port be added. I have not been able to find a means to accomplish this. I did find some *old* posts for using the AddPortEx/AddPrinter APIs from the winspool.drv, however, while I can ...more >>

Hi I am working on a pure managed windows application that creates large byte arrays at run time. In fact it creates a 50M byte array when the application starts public static byte[] buffer = new byte[1024*1024*50] I am using System.GC.GetTotalMemory() to monitor the memory usage. It is consist...more >>

I believe I have found a severe limitation of DotNet, with respect to hosting Windows Form Controls in WebPages. It appears this is only possible when the web is configured on Port 80. Any other port and the control will not display. After a couple of days of searching the newsgroups/various for...more >>

I am using the COM Profiling API to hook into the CLR and dynamically modify the program. I have been successful with the modification of existing methods, but now I want to add my own. To do this, inside the ModuleLoadFinished() method, I add the following call to DefineMethod: ...more >>

Hi All, We are trying to Serialize a System.Drawing.Cursor object and Deserialize it. Before serializing the cursor behaves correctly but when we serialize and use a deserialized object, the hotspot (the cursor pointer) is not where it is expected to be. We tried both binary and soap formatt...more >>

I am hoping this is a quick solution. I am trying to get the CLR Profiler working on my machine and it doesn't seem to be hooking into aspnet_wp.ex Here is what I do 1) Start the profiler on the web server, I choose "Profile ASP.NET 2) It stops IIS, Restarts IIS and gives me the "Waiting for AS...more >>

Hi everyone I was interested under which conditions the CTS grants access to program entities. So I took a closer look at the CLI Standard (mostly Partition I, section 8.5.3). What I found there didn't make sense to me. For instance, consider the following MSIL program public class Outer i...more >>

hi all SORRY FOR CROSSPOSTING: i did not know which group deals with this question! Question: i am looking to call the following function, ASYNCHRONOUSLY: Packet p = (Packet)this._BinaryFormatter.Deserialize(this._Stream); Can it be done? assaf ...more >>

If I create a BaseClass in a BaseAssembly, then derive a MiddleClass in a MiddleAssembly from the BaseClass, a TopAssembly that derives a TopClass from MiddleClass (or just creates a MiddleClass instance) needs to reference both MiddleAssembly and BaseAssembly at compile time, even if it does no...more >>

Hi, Does managed heap belong to specified app domain? If it does then is the collection done independently for all app domains? Kamil ...more >>

I'm getting the System.ExecutionEngineException from my data layer when I'm trying to Insert a duplicate row into the database using the ExecuteNonQuery method of command object. I'm using OLEDB connection in my application.I saw in the microsoft site saying that its an internal CLR error.So i tried...more >>

We have a .NET dll that we are deploying to our customers using a deployment project in VS .NET 2003. There is a lot of information about creating publisher policies on the web, but we have not been successful in creating one. Here's what the ultimate goal is: When the DLL is deployed to a custo...more >>

I am being supplied a count of number of seconds since Jan 1st 1970, i.e. a Unix system time. How can I convert this into a valid .Net DateTime object ? thanks, Mark WinXP / C#.Net 2003 ...more >>

I have a problem. The issue is that my embedded winforms in IE will not cache no matter how hard i try. They seem to goto the download assembly cache but they dont load from there like the framework documentation has stated. I have tried versioning, strong naming, and everything else i can think of....more >>

All I am in the process of load testing an application and I am not happy with the scalabity of the preliminary system. Under a moderate load of 300-400 users per test machine (Dual P4-700,3 Gig of ram), I am noticing some very slow page loads. To simulate the load, I have been using ACT (althou...more >>

I found that statement in some book but it does not comply with Framework SDK Documentation. Kamil Dworakowski ...more >>

I'm writing a utility to dump out the contents of any object. I'm having trouble getting indexed property values because I can't find a way to get the indexes themselves. PropertyInfo.GetValue takes an object and a collection of indexes, but I don't know what the index values are for the object ...more >>

I am getting a warning on a custom control that is first in the build order, and is used throughout my main project, which is called Practice Management This started appearing recently, and I am not sure why. More importantly, what do I have to do to fix it? Thanks J OUTPUT FILE FOLLOWS ---...more >>