c # class library and some static and non-static basis

Class Library

.dll file, use the library to help us to package some of the commonly used functions.

Static and non-static

Differences and similarities	Static state	Non-static
Whether static	Yes	no
Whether the class can create objects	no	Yes
member	There is only static members	Static and non-static available
Calls member method	Static class name. Static method name	Instance name. Instance members
Loading order	Static member is first loaded into memory and instance members
Release order	The entire project is over when released

• Only the object is created, only instance members.
• The project should minimize the use of static variables

Scenarios static class

• Tools. For example: Console class
• Resource sharing throughout the project time.

Constructor / destructor sequence

• 1. The base class constructor
• 2. The class constructor
• 3. subclass destructor
• 4. The base class destructor

The initialization sequence

• 1. subclass of static variables
• 2. subclass static constructor
• 3. subclass of non-static variables
• 4. parent class static variables
• The parent class static constructor
• 6. parent class non-static variables
• 7. parent class constructor
• 8. subclass constructor