By 22/07/2015 12 Comments

C# Static Classes

  • In C# object oriented programming classes can also be created / declared as static by prefixed them with keyword static. Static class is required for creating an extension method.
  • No object of a static class can be created and a static class must contains only static members (methods and variables).
  • When we create any static class we must explicitly marks its all members (methods and variables) with keyword static and make them static members of a class.
  • Static class does not contain non-static members because static class prevents us from non-static member’s declaration.


using System;
namespace csharpBasic
    // A static class declaration
    static class MarkSheet
        // Declaration of a double type static property TotalMarks.
        public static double TotalMarks
                return 300;

        // Double type static fields or class variables are initialized.
        static double AspMarks = 85;
        static double JsMarks = 60;
        static double CssMarks = 65;

        // Foolowing are double type static methods.
        public static double GetAspMarks()
            return MarkSheet.AspMarks;

        public static double GetJsMarks()
            return MarkSheet.JsMarks;

        public static double GetCssMarks()
            return MarkSheet.CssMarks;

        public static double GetObtainMarks()
            return MarkSheet.AspMarks + MarkSheet.JsMarks + MarkSheet.CssMarks;

        public static double GetPercentage(double obtainMarks)
            return (obtainMarks / MarkSheet.TotalMarks) * 100.0;

    class Program
        static void Main(string[] args)
            /* Following statements print each static method’s result 
               by calling it through class name. */
            Console.WriteLine("Mark sheet:");
            Console.WriteLine("Total marks: {0}", MarkSheet.TotalMarks);
            Console.WriteLine(" marks: {0}", MarkSheet.GetAspMarks());
            Console.WriteLine("Javascript marks: {0}", MarkSheet.GetJsMarks());
            Console.WriteLine("Css marks: {0}", MarkSheet.GetCssMarks());
            Console.WriteLine("Total obtain marks: {0}", MarkSheet.GetObtainMarks());
            Console.WriteLine("Percentage: {0}", MarkSheet.GetPercentage(MarkSheet.GetObtainMarks()) + " %");

        The Output will be:
        Mark sheet:
        Total marks: 300 marks: 85
        Javascript marks: 60
        Css marks: 65
        Total obtain marks: 210
        Percentage: 70 %

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