Static

Smart Lucky

15y2.2kAzure

hi

Can any one tell me

Static blocks execute first than Main method....?

and why we static the main method.....?

6 Replies

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Sam Hobbs15y ago
Accepted answer
Wow! Three people saying much the same thing. So I may as well be the fourth.

The one thing that has not been made clear is that the Main method is called by Windows. Windows is language-agnostic (language-independent); it can execute programs written in a variety of computer langauges and compiled by a variety of compilers. Windows can execute programs written in C#, C++, VB .Net, VB 6, COBOL or many other languages as long as the compiler generates the a compatible executable file.

The C# language could have been designed so that a runtime initialization routine instantiates a specified class but that is not how it was designed. It would also be confusing for beginners such as you if the startup function was not static because the beginner would complain about not being able to create more than one instance of their class. The Main method can be called only once per execution and making it static makes it clear that there can only be one instance of the method executing.
Vulpes15y ago
Accepted answer
Here's a simple example which illustrates the points I made in my previous post:

using System;

struct Program
{
static int MyInt = 3;

static Program()
{
Console.WriteLine("MyInt has a value of {0} rather than its default value of 0", MyInt);
}

static void Main()
{
Console.WriteLine("Hello from Main");
Console.ReadKey();
}
}

The output of this program is:

MyInt has a value of 3 rather than its default value of 0
Hello from Main
Vulpes15y ago
Accepted answer
The Main() method needs to be static because otherwise you'd need to create an instance of its containing class or struct to call it and it could not then be the entrypoint to the application.

Despite this, static fields in the same class or struct as the Main() method are initialized first and the static constructor (if any) is also called by the system prior to the Main() method being executed.
Sandeep Shekhawat15y ago
Accepted answer
Main() is an entry point in standalone application . for static:
http://blog.sharptrainer.in/index.php/archives/66
Rohatash Kumar15y ago
Main()- main() is the by default starting point for code execution, we cannot instantiate your class before main() starts executing.

Static - Static methods are shared methods. They can be called with the class name and static method name only. No need of instance to call static methods.

example

class Program
    {
        public class test
        {
            static string name;
            static int age;
            static test()
            {
                Console.WriteLine("Using static constructor to initialize static data members");
                name = "Rohatash Kumar";
                age = 23;
            }
            public static void display()
            {

                Console.WriteLine("Using static function");
                Console.WriteLine(name);
                Console.WriteLine(age);
            }
        }
        static void Main(string[] args)
        {
            test.display();
            Console.ReadLine();
        }
    }
15y ago
If main() is not static, it can only be called on behalf of an instance. To create an instance, code must execute. As main() is the default *starting point* for code execution, you cannot instantiate your class before main() starts executing. A static method, on the other hand, can execute before any instance is created.

http://www.dotnetspider.com/forum/152203-why-do-we-need-static-keyword-for-Main-method.aspx
http://www.dotnetperls.com/static-method
http://www.blackwasp.co.uk/CSharpStaticBehaviour.aspx