A little knowledge of C # supplements (ii)

Small Knowledge (ii)

Bitwise operators:

and:& bits are all 1 o'clock, the result is 1, otherwise 0. Binary operations, bitwise comparison.

Or: | Bits are 0 o'clock, the result is 0, otherwise 1. Binary operations, bitwise comparison.

XOR: ^ bits phase, the result is 0, otherwise 1. Binary operations, bitwise comparison.

Inverse: ~ Binary 0 o'clock, the result is 1, otherwise 0. Unary operation, bitwise comparison.

The left displacement:<< is equal to the N power by 2. Binary operations.

The right displacement:>> equals the n power of 2. Binary operations.

Logical operators:

Or: | | When two bool values are false, the result is false, otherwise true. Binary operations.

Logical non-:! False, the result is true. A unary operation.

The logical and:&& two bool values are true when the result is true, otherwise false. Binary operations.

PLACEHOLDER:

Placeholders are often used when we use console.write/console.writeline, such as: Console.Write ("{0}", i);

The placeholder {0} must be zero-based and less than the parameter list size.

Can be Console.WriteLine ("{0}{4}", 6,9,9,2,4), so write, output 64.

Console.WriteLine ("{0:x5}{4}", 6,9,9,2,4); output 000064, note: X5

Ask the master to ask the binary press 8-bit output how to do? such as the binary 100 output to 00000100. How do I add 0 methods to a string without turning it???

GetType ():

Gets the type of the current instance. such as int i=1; Console.WriteLine (I.gettype ()); Output: System.Int32

GetTypeCode ():

Returns the underlying typecode of the instance.

var i = 1;if (I.gettypecode () ==typecode.int32.gettypecode ()) {...} is:

Represents a bool value

    if (i is int)    {...}

As

Object obj = new Object (); Creates a base class object.

Program P = obj as program; If obj (reference) is incompatible with the program class, the result is null.

    if (p==null)    {...}

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