By 22/07/2015 5 Comments

C# Basic Program Structure

Example, a simple program structure:

using System;
namespace csharpBasic
{
    // Start class definition / declaration.
    class Program
    {
        // Static main method void type declaration.
        static void Main(string[] args)
        {
            // An int type variable is declared and initialized.
            int studentRollNo = 78005;

            // Print variable.
            Console.WriteLine(studentRollNo);

            Console.ReadKey();
        } // End of main method definition. 
    } // End of class. 
}

STATEMENT DESCRIPTION
using System; This statement imports system library of framework.
class Program { } Declare a class with name Program.
static void Main(string[] args){ } Declare main method of static and void(return) Type, pass 1 parameter in it (string[] args) which is a single dimensional array with name args. This square brackets { } is a body of that method that contains the main code logic. This is also called a gateway method because when we run the program the compiler calls this method and executes our code.
int studentRollNo = 78005; This statement declares a variable studentRollNo of type int (integer) and assign store 78005 values in it by using assignment (=) operator. This is (;) called sign of termination and is used for terminate any statement (end of- statement), also tells to compiler “This is end of code terminate it”.
Console.WriteLine(studentRollNo); This statement display output as 78005 by passing studentRollNo int (integer) type variable. (Console) keyword is a class name which is exists some where else in dot net’s (System) library (WriteLine(studentRollNo)) is a method of that Console class, pass 1 argument studentRollNo which is 78005 in it. This is a static and void type method of Console class. This method called by Console class using a (.) dot operator, that dot (.) operator Joins that method with its class.





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Posted in: C# Basics, C#.NET

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