The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘C# 2.0’ Category

Using ILDASM to determine the .NET Framework version an Assembly/DLL requires (via StackOverflow)

Posted by jpluimers on 2013/07/11

Josh Stodola wrote a nice answer on the Determine .NET Framework version for dll – Stack Overflow question for using ILDASM to show the required .NET Framework/CLR version for an assembly.

From that, I wrote this tiny batch file:

ildasm.exe %1 /metadata[=MDHEADER] /text /noil | find "Metadata section:"

It gives output like this:

ildasm.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\System.XML.dll /metadata[=MDHEADER] /text /noil | find "Metadata section:"
// Metadata section: 0x424a5342, version: 1.1, extra: 0, version len: 12, version: v4.0.30319

The cool thing is that older ILDASM versions work on assemblies requiring newer .NET Frameworks/CLRs.

So it is relatively future proof.

–jeroen

Posted in .NET, .NET 1.x, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Software Development | Leave a Comment »

“Fragile Base Class problem” C# posts by Eric Lippert

Posted by jpluimers on 2013/07/04

I’m not the only a big fan of  almost anything that Eric Lippert writes on tech subjects on both his new personal Fabulous Adventures In Coding blog as well as his old microsoft Fabulous Adventures In Coding blog (a little more than half a year ago, he moved from Microsoft to Coverity.

On his old blog, he had a great series of posts on the “Fragile Base Class problem” (which he calls the Brittle Base Class problem) from a C# perspective.

Be sure to also read the comment threads, as they provide some very valuable information too (for instance, about Extension Methods that can make your code more fragile).

Recommended reading!

–jeroen

via: Browse by Tags – Fabulous Adventures In Coding – Site Home – MSDN Blogs.

Posted in .NET, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Software Development | Leave a Comment »

.NET/log4net configuration: LevelMatchFilter with DenyAllFilter to discard several log levels within a range

Posted by jpluimers on 2013/06/27

log4net configuration can be a tad intimidating at first.

When you do not want to log all levels, and the levels you want to log are not noncontinuous, then you can combine the LevelMatchFilter with a DenyAllFilter.

The filter classes in the log4net do not provide much help on this, but the filters section in the log4net manual is better.

This StackOverflow question has a very nice answer explaining it: Discarding several log levels within a range with log4net.

–jeroen

via: Discarding several log levels within a range with log4net – Stack Overflow.

Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Software Development | Leave a Comment »

C#/.NET/LINQ: DotNetStat: netstat.exe with TCP ports grouped by host

Posted by jpluimers on 2013/06/18

A lot of people have written .NET equivalents of netstat code. Basically there are two starting points:

I adapted the first, made the output very much like the built-in Windows netstat, and added some LINQ code to demonstrate grouping and ordering.

Now you get grouped output like this:

Distinct Remote Address:Port pairs by Remote Address:
107.20.249.140   443
107.20.249.78    443
127.0.0.1        6421, 19872
192.168.1.81     17500, 61678
199.47.218.159   443
199.47.219.148   80
199.47.219.160   443
23.21.220.140    443
23.23.127.94     443

The code below is part of the DotNetStat example.

It demonstrates a few important LINQ aspects beyond the LINQ Query Expressions (C# Programming Guide) intro and 101 LINQ Samples in C#.:

Read the rest of this entry »

Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Jon Skeet, Software Development | Leave a Comment »

.NET/C# – CreateTemporaryRandomDirectory (via: Stack Overflow)

Posted by jpluimers on 2013/06/13

A while ago I needed unique temporary directories. This appears not to be standard functionality in the .NET System.IO.Path or System.IO.Directory class.

Josh Kelley asked a question about it before, and I adapted the example by Scott-Dorman based on GetTempPath and GetRandomFileName  and comments by Chris into a more robust CreateTemporaryRandomDirectory one that works in .NET 2.0 and higher:

using System.IO;

namespace BeSharp.IO
{
    public class DirectoryHelper
    {
        public static string GetTemporaryDirectory()
        {
            do
            {
                try
                {
                    string tempPath = Path.GetTempPath();
                    string randomFileName = Path.GetRandomFileName();
                    string tempDirectory = Path.Combine(tempPath, randomFileName);
                    Directory.CreateDirectory(tempDirectory);
                    return tempDirectory;
                }
                catch (IOException /* ex */)
                {
                    // continue
                }
            } while (true);
        }
    }
}

You can call it like this: Read the rest of this entry »

Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Software Development | 2 Comments »

Counting Lines of Source Code in PowerShell | Precision Computing

Posted by jpluimers on 2013/04/30

Precision Computing is a site by Lee Holmes having a great blog with PowerShell tips. Of course he does, as he is part of the PowerShell team and he wrote Windows PowerShell Cookbook: The Complete Guide to Scripting Microsoft’s New Command Shell.

The Counting Lines of Source Code in PowerShell entry is on counting C# code lines (and shows some great performance optimization tips).

I knew about the blog, and bumped into the entry because of file – Lines-of-code counting for many C# solutions – Stack Overflow.

Last year I inherited a suite of .NET projects totaling about 4 million LOC. Which I want to drastically reduce to make it more maintainable.

–jeroen

Posted in .NET, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, CommandLine, Development, PowerShell, Software Development | Leave a Comment »

Command line tool to manage Windows 7 Libraries, with source code – The Old New Thing – Site Home – MSDN Blogs

Posted by jpluimers on 2013/02/28

Interesting: Command line tool to manage Windows 7 Libraries, with source code – The Old New Thing – Site Home – MSDN Blogs.

Especially as next to some documentation, it points to these two:

–jeroen

Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, Batch-Files, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Scripting, Software Development | Leave a Comment »

Behind the Code with Anders Hejlsberg (via: Cape Cod Gunny Does Delphi: Priceless)

Posted by jpluimers on 2013/02/26

I remember having heard this interview on audio a long while ago, but couldn’t find it back. Now I stumbled across Cape Cod Gunny writing about this great video where Anders Hejlsberg is interviews by Research Channel for an hour. To quote Cape Cod Gunny:

I just watched this interview with Anders Hejlsberg for the first time. This is truly an amazing interview. It’s rather long, about 1 hour, but it is so worth it. I’m not giving anything away… you’ll have to just watch and enjoy.

I am giving a few things away: trip down memory lane, putting big parts of software development history into perspective,

Since Anders has been so versatile, influential and still humble, this is a must watch for anyone in the software field. To quote Research Channel:

This episode features industry luminary, Anders Hejlsberg. Before coming to Microsoft in 1996 he was well noted for his work as the principal engineer of Turbo Pascal and the chief architect of the Delphi product line. At Microsoft, he was the architect for the Visual J++ development system and the Windows Foundation Classes (WFC). Promoted to Distinguished Engineer in 2000, Anders is the chief designer of the C# programming language and a key participant in the development of Microsoft’s .NET Framework. In this show, Anders is joined by a surprise guest. This episode of ‘Behind the Code’ is hosted by Barbara Fox – former senior security architect of cryptography and digital rights management for Microsoft.

Thanks Gunny for pointing me at this!

–jeroen

via: Cape Cod Gunny Does Delphi: Priceless: Behind the Code with Anders Hejlsberg.

(PS: how a video published in the C# 3 era can be so current <g>).

And if you feel for more, here, hereherehere and here are some more, are a few lists of videos where Anders speaks.
From a historic perspective, I like these most:

Posted in .NET, .NET 1.x, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Delphi, Delphi 1, Delphi 3, Delphi 4, Delphi 5, Delphi 6, Development, Software Development | 4 Comments »

Vista and up: CardGames.dll (was: Delphi – back in 1996 – CARDS.DLL component wrapper in Delphi 1 and 2!)

Posted by jpluimers on 2013/02/19

About 3 years ago, I wrote a small article about the Cards.dll that I encapsulated even longer ago.

I just did some looking around to see on which versions of Windows Cards.dll was still available, as Card.dll has been there since the Windows 16-bit era.

Conclusion: this C# example shows was available on Windows XP, but it seems not available on Windows Vista and up.

The successor is CardGames.dll, which is far bigger than Cards.dll, only has resources (but way more than Cards.dll), and no code.

I’ll probably use XN Resource Editor 3.1 for some investigation later on to see how to get some demos running on more modern versions of Windows (:

–jeroen

via:

Posted in .NET, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Delphi, Development, Software Development | 4 Comments »

Impossible: Property using Generics in Delphi. Interfaces/classes/methods/fields/constraints/type inferencing are

Posted by jpluimers on 2013/01/30

Just in case you wonder about Property using Generics in Delphi, they are not possible.

Thanks David for mentioning it, Hallvard for mentioning it even earlier and Rudy for confirming it.

These are supported with Generics in Delphi:

All of the supported aspects are linked to articles from excellent authors. There is far more on the internet about Delphi and Generics, but those are a good start.

Thanks Malcolm, Phil, Barry, Hallvard, Jolyon and many others for posting all those articles!

Note that this is not possible in C# either, Julian Bucknall organized a chat and explains why, but there is a workaround which I might try to port to Delphi in the future.

–jeroen

via: Property using Generics in Delphi – Stack Overflow.

Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Delphi, Delphi 2009, Delphi 2010, Delphi XE, Delphi XE2, Delphi XE3, Development, Software Development | 3 Comments »