Can a Static Class Have Non Static Members
Divergence Between Static Form, Sealed Class, and Abstract Grade in C#
Difference Betwixt Static Class, Sealed Class, and Abstract Class in C#
We come across this question very often that what is the difference betwixt Static, Sealed and Abstruse grade in C#. Static Class: Alleged with Static keyword, methods in Static Class are also static along with variables of the grade. This course cannot exist instantiated, i.e nosotros cannot have objects of this grade. To access methods of this course, you lot can directly use classname.method. Also this class cannot be inherited. Sealed Class: Declared with Sealed keyword, which enables this class to seal all its variables, methods and properties. No other class tin can inherit anything from this form or in other words, this class cannot be inherited. But we can instantiate this form, i.eastward we can accept whatever number of objects of a sealed class. Abstract Course: Declared with abstract keyword, this grade is primarily created as a Inheritable class. An abstruse form enables other classes to inherit from this form, just forbids to instantiate. Ane can inherit from an abstract class but we cannot create objects of an abstract grade. Abstruse form can have abstract as well as not abstruse methods. Abstract methods are those which are non having method definition. One of import bespeak to remember is a non-static class can accept static methods. Just Static classes must have all members as Static.
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Source: https://social.technet.microsoft.com/wiki/contents/articles/21028.difference-between-static-class-sealed-class-and-abstract-class-in-c.aspx