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Posted 24 Jan 2013
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Write right

, 24 Jan 2013
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Regarding use of the various Write and WriteLine methods
Last night a couple of users posted some code snippets with a common inefficiency related to Console.Write. I don't mean to belittle these users' skills, but rather to speak out about whoever is teaching them.

The relevent snippets are: Console.Write(j.ToString()); and Console.Write(counter.ToString() + (innerloop + 1).ToString() + ",");

Yes, the code works as expected, but do you see my concern about inefficiency?

The first one isn't as bad as the second; it can be reduced to: Console.Write(j); because the Write will perform the ToString() anyway so rather than saving effort, you've increased it.

The second one is more of a concern, I recommend: Console.Write("{0}{1}," , counter , innerloop + 1);

I hope you'll agree that using the overload that allows the Format ([^]) makes the code more readable. But it is also more efficient because it avoids a number of intermediate strings.

Many classes provide Write and WriteLine methods; Console and TextWriter are just two, and there's also String.Format and StringBuilder.AppendFormat -- all of these allow the use of a format and I suggest you use it. This ([^]) should provide some background on formatting.

So, if you are teaching .net, please show your students more than one overload of a method. If you are a student, please investigate all the methods and overloads a class provides; not only what a teacher, a book, or a tutorial demonstrates. If you are using Visual Studio (and you probably are) use Intellisense to see what options you have; use the right tool for the right job.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

Software Developer (Senior)
United States United States
BSCS 1992 Wentworth Institute of Technology

Originally from the Boston (MA) area. Lived in SoCal for a while. Now in the Phoenix (AZ) area.

OpenVMS enthusiast, ISO 8601 evangelist, photographer, opinionated SOB, acknowledged pedant and contrarian


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