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Someone can explain how Collections.Concurrent library are work ?
How we get the thread-safe ?
Is their performance are good ?
You can inspect the concurrent collections implementation by yourself here (this is for ConcurrentDictionary<TKey,TValue>, other collections you can find using the left navigation pane) and get the exact picture of how they work.
The implementation depends on the collection type. It uses volatile, SpinWait, Interlocked and lock.
More information about performance is available in this paper.
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I am explaining the purpose and usage of the C# params (C++CLI ...array) keyword to my colleague and wanted to show him some functions of .net that make use of it. But right know I don't remember any.
For those who want to answer: Feel free to list as many as you know. But I would be happy with one already.
string.Format("It is now {0}.", DateTime.Now)
Console.WriteLine("It is now {0}.", DateTime.Now)
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I am a new user of C# (for work), coming from C++ development. I'm used to knowing more or less how data is laid out, and how many levels of pointer indirection there are, as these things can be very important for performance.
I know I'm supposed to just relax and have a good time hammering out business software and not think about these details on the clock, but is there good documentation for this for C# somewhere?
I know there is compilation to IR, and then JIT to native code, so I guess I am asking about how C# source relates to the native x86-64 code.
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I am near release date for my Excel Add-In and I want to have only one limitation hardcoded in the code. My aim is for people to download and use the tool for free but have a limitation that potentially encourages them to buy the unlimited version. I know that there isn't a truly secure way to add that limitation but I was wondering what is the best way of achieving it. The limitation is simply a hardcoded value that I store in the Properties section of my app. Any ideas how I can make it a bit more secure?
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There are two ways to create a form in c# application:
Add a new class describing form elements and behavior
Generate it all dynamically.
Q : What are the advantages of the second method?
Which can give more performance or reduce memory using and how about scalability?
Static UI should be your first choice. Dynamic UI is an option to consider, but only if you have a compelling reason. If you don't have a concrete reason to look for dynamic UI, and just have a vague feeling that one might be better then the other, then stick to static UI.
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Is there a way to read text(numbers and letters) in an image using C# ? Is this possible and What is the best way to do this ?
Thanks!
http://code.google.com/p/tesseract-ocr/ has some wrapper to use it in .NET, or, simpler:
http://www.codeproject.com/KB/office/modi.aspx but you need to keep an eye to the license since it is a part of the Office suite. In both case you tipically need some pre processing for the image and, as a solution I did in the past, some post processors that using some ehuristict correct the mistaked words.