why not allowed: name="Bob"; ?

in non static class, static member can be initialized at it declaration or in static contrunctor. in non static class you can not access static member directly you have access through class name.

1. class Program  
2. {  
3.     static string name; // this is initailzing at below static contructor  
4.     static string lastName = "Marley"; // this is initailzed at here means declaration.  
5.     static Program()  
6.     {   
7.         name = "Bob";   
8.     }  
9.     //naam="Bob";  
10.     public static void Welkom()  
11.     {  
12.         Console.WriteLine("Welkom " + Program.name + " !");  // static vaiable name is accessing through class level
13.     }  
14.     public static void Main(string[] args)  
15.     {  
16.         Welkom();  
17.     }  
18. }