Main Method in C#

See following points,

1. Main() method is the starting point of a program.
   
   
2. Main() method is always "Static".
   
   
3. Main() should NOT be "Public". Default access specifier of Main() is Private.
   
   
4. Following are the acceptable signatures of Main() method,
   

   static void Main(string[] args){}
   
   static void Main(){}
   
   staticint Main(string[] args){}
   
   staticint Main(){}

5. Main() method can have either of the two return types - void and int.
   
   
6. Main() method can either have input string arguments or none.
   
   
7. There can be only one entry point in a program. However, we can have multiple Main() in the same project. But you need to define the "Startup object" defining which is the single entry point.
   
   Sample Code:
   
   We have two classes,
   

   namespace ConsoleApplication2
   {
       //Class 1
       public class Class1
       {
           static void Main(string[] args)
           {}
       }
       //Class 2
       public class Class2
       {
           static void Main(string[] arg)
           {}
       }
   }

   When you compile this program, you can see both classes listed as Startup objects in Property pages of the Project.
   
   You need to select one of the two.