Home > Article > Backend Development > static class
static class
- PHP中文网Original
- 2017-06-17 16:24:371116browse
The C# compiler imposes the following restrictions on static classes:
1. Static classes must be directly derived from the base class System.Object. It is meaningless to derive from any other base class. Inheritance only works with objects, and you cannot create instances of static classes
2. A static class cannot implement any interface. This is because the interface method can only be called when it is an instance of the applicable class.
3. Static classes can only define static members (fields, methods, properties and events). Any instance members will cause the compiler to report an error
4. Static classes cannot be used as fields, method parameters or local variables, because they all represent variables that refer to instances, which is not allowed at this time. The compiler will report an error if it detects any such usage
The above is the detailed content of static class. For more information, please follow other related articles on the PHP Chinese website!
Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：Direct call vs reflective call example tutorialNext article：Direct call vs reflective call example tutorial