Code Improvement Techniques In C#

• Strings are immutable and StringBuilder is mutable.
• If you need large amount of string manipulation, use StringBuilder.
• Strings are immutable. So, if you change your strings, then every time a new instance will be created into the memory.

When to choose StringBuilder

If you need more than THREE times string manipulating, use StringBuilder.

String concatenation vs. string.Format

• Do use AppendFormat for StringBuilder.
• Do use String.format for string.

Advantages

• Improve readability.
• Improve performance.
• Easy to modify.

Case insensitive comparisons



Out vs. return



The method that use return is faster than out.

Remove Un-necessary Blank Lines



Better to remove unnecessary blank lines and white spaces.

• It improves code readability.

Linq - First vs. FirstOrDefault



First

There is one or more than one element in the result, but you need the first one and empty is not okay. It throws an exception, if list is empty;

FirstOrDefault

There is one or more than one element in the result, but you need first one or empty is okay. It throws an exception, if source-list is null. Single vs. SingleOrDefault

FirstOrDefault is faster than SingleOrDefault.

IDisposable.Dispose vs. Using Block

Better to use 'Using block'. It calls dispose, although there could have an exception or return statement.

Magic Value



Don't use magic value (hard coded string, number) directly in your code block. Place all of the hard coded values into one separate class or at least on top of the class. It will improve code manageability.

Still I want to say more but I'm used to caffeine-driven development. I have already finished my coffee. So, no more words. If you maintain good practices, you are ready to move on to the next journey. Don't let yourself down.