What is a non-static class in C#?

Non-static classes can be instantiated, whereas static classes cannot be instantiated i.e. you cannot use the new keyword to create a variable of the class type.

Non-static classes can have instance method and static methods.

Access the members of a static class by using the class name itself, whereas Static class is sealed.

Example of non-static class −

public class Calculate

Example of static class −

public static class Calculate