What is a “static” class?

Question

In C# what is the difference between:

public static class ClassName {}

And:

public class ClassName {}

Answer 1

public static class ClassName {}

A static class is just like a global variable: you can use it anywhere in your code without instantiating them. For example: ClassName. After the dot operator, you can use any property or function of it.

 public class ClassName {}

But if you have non-static class then you need to create an instance of this class. For example:

 ClassName classNameObject = new ClassName();