why main() contains static?

Hi,

Static methods are the methods which do not require any object whenever they are called. These methods are loaded even before the class is loaded in the memory. It means that even before the object is being created . the method is already loaded into the memory. Other than this, Main() is the entry point for any program. It means whenever you run a program, the compiler looks out for the Main method. If there is a main method then the content onside it is executed.... The main method is the first access point for any program and has to be called automatically. Since it is static it gets loaded automatically even before the object of that class is being created and. Main() does not require any object to be called!

class MyClass
{
public void myDetails()
{ Console.WriteLine("Hello World"); }
public static void Main()
{
MyClass m = new MyClass();
m.myDetails();
}
}

See in this example, i have created a non-static method which requires an object to be called. The method gets loaded into the memory when the complier
executes the line m.myDetails(); Main method is static and does not requires an object to be created to call it.Hence it is static and the other reason is that it is the entry point for any program.

Suppose you had this where the Main() method was not static:

class Program
{
      void Main(string[] args)
      {
          // code
      }
}

The CLR would then need to create an object of type Program before it could call the Main() method.

So the Main() method would not be the entry-point to the program - it would be Program's constructor instead.

The Main() method therefore needs to be static to avoid this situation.