.NET Tips and Tricks

I’m sure you all know that according to the rules of elementary arithmetic division by zero is not allowed*. Also, I’m pretty sure you are familiar with the “Attempted to divide by zero” exception and some of you even write a specific catch in try…catch blocks to catch the DivideByZeroException to be able to handle it according to your application needs.

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About a year ago i had to architucture some web application with a very rich client side UI.

ASP.NET was an easy choise for a server side code, but what about client side ?
The heavy viewstate, endless event handlers and infinity number of server side requests just to make the GUI  friendly – well, it just didn’t sound as a proper way to do it.

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I’m pretty sure all of you know the WebRequest and it’s derived class HttpWebRequest.
And what a marvelous property both of them have – the TimeOut.

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Let’s say you have to parse some HTML, find all images or some other DOM elements make some changes/optimizations and save the result. What can you do ?

Well, i needed something like that a few days ago and after Googling for couple of hours I ran across this this great library called HtmlAgilityPack.

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Another great interview question.

Will the following code compile and if yes what will be the result of it ?
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This one is a great c# interview question – short and simple, but tricky.

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A couple of days ago i found a great framework called AForge.NET.

AForge.NET is a C# framework designed for developers and researchers in the fields of Computer Vision and Artificial Intelligence – image processing, neural networks, genetic algorithms, machine learning, robotics, etc.

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Sometimes, you’re faced with the problem to cramp as many smaller textures as possible onto a larger texture. Typical cases are lightmaps, which are very small textures with dimensions that usually are not powers of two, or bitmap fonts where you want to try and fit the entire ascii character set onto a texture without wasting much space.

What you need then, is a rectangle packer, an algorithm that arranges as many smaller rectangles on a larger rectangle as can possibly fit.

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It is very important to be able to dynamically control the behavior of .NET applications and to keep track of some of the aspects of the application (i.e. how the application is performing, what errors are produced during runtime, how the application performs at peak times, how to dynamically alter the behavior of the application, etc).

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This is a very simple question with a not so simple answer…

Forget for a second about .NET.
If someone asks you how much is 1.000025 – 0.000025 your answer will probably be “1″ and correct. An easy question, right ?

Now, let’s go back to .NET and check if our calculations are correct.

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