A static class is a class that contains only static members and cannot be instantiated. You don’t create an instance of the class, but rather just access its members directly.
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| public static class DogUtil{ public static void DoSomething() { Console.WriteLine("I'm doing something"); }} |
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| public static class DogUtil{ public static void DoSomething() { Console.WriteLine("I'm doing something"); }} |
You typically use a static class to hold a collection of methods that are utility methods and don’t need to act upon data that is persisted within a particular object.
As an example, the System.Math class in .NET contains a lot of math utility methods. Each method operates in a stateless way. That is, the method accepts one or more parameters, does some calculations, and returns a result.