C # Basic Article 01

vs20vs2013 shortcut key section:

1>:

#region

#endregion (used to collapse redundant code)

2>:ctril+k+d quickly on its code;

3>:ctril+k+c Comment Check Code

Ctril+k+u uncheck Annotations

4>: F1 go to help document

5>:F12 go to the definition of the class

Transfer characters:

1 : \b Backspace

2 : \ \ denotes \ this character;

3 : \ n Enter

4 : \ r \ n is used to write a text to the Windows desktop What is used for enter, only \ n (but Mac system knows);

5 : \ t a tab stop

6 : the @ symbol function:1> cancels the function of a literal in a string, making it simple to represent a \; (for example: When writing a file path, we are accustomed to writing: string [email protected]"C:\PromgramFile\Commen\avi\XX.avi " of course, you can also write this: String Path=c:\\programfile\\commen\\avi\\xx.avi)

2> the string is exported in the original format. For example: System.writeline (@ "The weather is fine today,

Good scenery everywhere! "), so you can output line breaks, spaces, and so on.

When a valid number is retained after the decimal point: with placeholders, for example:

Double a=10;

int b=3;

Double c=a/b;

Console.WriteLine ("{0:0.00}", c); retain two decimal places;

Console.readkey ();

Unary operators have precedence over the two-tuple operator! Like + + or--it is a unary operator, and the + 、-、 *,/,% these are two-dollar operators.

Example:

int a=5;

int b=a++ + ++a*2+--a + a++;

Output a=7;b=31;

When you enter MSPaint in the Run box, the artboard is opened;

When you enter Notepad in the Run box, Notepad is opened;

When you enter write in the Run box, the WordPad is opened;

Reverse () The method and the sort () method are static methods that are called by the class name when called!!! That is, the array class. Like: Array.reverse (str), Array.Sort (number), and so on. Where Str is the string array name and number is the integer array name.

C # Basic Article 01