Single-line comments are usually ideal for short notes that you want to put on a line by itself, or following a line of code.

You create a single-line comment by typing forward-slash twice ( // ), followed by whatever note you’d like to leave. Everything following the double-slashes on that line is considered a comment. The following examples demonstrate different uses (green text are comments).

//This is a single-line comment

//Set a value for the strCoffeePot variable
string strCoffeePot = CoffeeMaker("water","beans");

iCountVisits = ++iCountVisits; //Increments iCountVisits by 1

//int iCountVisits = ++iCountVisits; //Increments iCountVisits by 1

Multi-line comments have two particular uses: leaving large notes (several sentences to several paragraphs), or disabling large chunks of code. There are two shortcuts for multi-line comments, one shortcut that BEGINS the comment ( /* ), and another shortcut that ENDS it ( */ ). Everything between the two shortcuts is considered a comment.

The following examples demonstrate different uses.

/*
This is a multi-line comment.
*/

/*
To whosoever reads this, I am so very, very sorry for the state of this
code. It's labyrinthine and convoluted logic has driven me nigh unto
the depths of despair, so that I long for the sweet embrace of kind
and merciful death. I pity you, and wish you all patience of the ages.
*/

/*
string strCoffeePot = CoffeeMaker("water","beans");
iCountVisits = ++iCountVisits; //Increments iCountVisits by 1
*/

Did you know that Visual Studio will let you “collapse” (aka “minimize”) and “expand” chunks of code? If you look at the left side of the Text Editor window you may see some of those familiar [+] or [-] symbols you’re used to seeing in various tree views. These are automatically available for methods, classes, and namespaces… but what if you have a big chunk of code that you want to collapse without collapsing the entire method?

This happens often – for instance, you may have a few lines of code inside a method that deals only with sending an email, and you wish it didn’t take up so much screen space. Well, you can wrap it in region tags, which serve no other purpose than making those [+] and [-] icons appear (for the region). Hence, you can take a big chunk of code and collapse it into a single line comment.

#region This is like a single-line comment, describing the contents of the region
//lots of code goes here
#endregion

When collapsed, the above example would look like this…

This is like a single-line comment, describing the contents of the region