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C# provides the important feature to create static classes, there are two main features of a static class, one is no object of static class can be created and another is, a static class must contain only static members, then it is important that what is the main benefit to create a static class, the main benefit of making static class, we do not need to make any instance of this class ,all members can be accessible with its own name.

Declaration

A static class is created by using keyword 'Static' as shown here:

  1. Static class Clasname
  2. {
  3. //C#
  4. }

One more thing that is notable-within static class, all members must be explicitly specified as static, static class does not automatically make its members static. Static class can contain a collection of static methods.

Example

  1. using System;
  2. static class Shape {
  3. public static double GetArea(double Width, double height) {
  4. return Width * Height;
  5. }
  6. }
  7. class Ractangle {
  8. private void GetRactangleArea() {
  9. Double Area;
  10. Area = Shape.GetArea(10, 5);
  11. }
  12. }

Shape is static class, it contain staic function GetArea.Ractangle is other class and with in GetArea function can be access without creating instace of Class Shape.

Although a static class cannot have an instance constructor, it can have a static constructor.