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C# - Basics - Classes - Static Classes
Şubat 10, 2011 by C# Tutorial

Static Classes in C#


This topic contains and tries to cover following subjects:
- Explanation of Static Classes in C#
- An example of Static Class in C# with basic console application example
- Syntax of Static Class in C#

#Explanation of Static Classes


In a C# Class, the methods or fields can be static to be used without instantiating-creating object of the Class. A known example of Static Class usage is Console Class which is used in console applications to provide output in console output with static method "WriteLine()".

Apart from making a field or method static, C# supports static Classes. Idea behind of making a Class Static is to get help from Visual Studio to prevent unwanted object creations. In following image it is shown: a non-static Class with static field has been declared. Due to the static field, it is possible to access its field without instantiating it.

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Class itself is still available to be instantiate. When it is planned to design a Class with all members static, it is a better practice to make it static.

What are the benefits or purpose of Static Classes can be question. Mainly two reason addresses the answer:
1. Static Classes guarantee that a instance is never created.
2. Visual Studio checks Static Class members in compile time. When Class is static, non-static member declaration is compiler time error. It helps consistent Class development.

#Example of Static Class in C#


Static Class Example contains following steps:
- Created a console Application
- Added a Class which had been demonstrated at earlier screenshot. Static keyword is addded preceding Class keyword
- Added one Static Class field


Following console application is created. 

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;





namespace  NS_hardwareManagerApp

{

    static class CL_notebooks

    {

        public static string  field_notebookName;

        



    }

    class CL_x

    {

        static void Main(string [] args)

        {

            

            

        }

    }

}


Preceding code snippet, creating an object-instance from that Class ends up with compiler error. Also VS indicates non-static member definition declarations within Class.

MSDN link below explains static Classes with more detail.



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