Static Constructors

    A static constructor is used to initialize any static data, or to perform a particular action that needs performed once only. It is called automatically before the first instance is created or any static members are referenced.

Static constructors have the following properties:

• A static constructor does not take access modifiers or have parameters.
  
• A static constructor is called automatically to initialize the class before the first instance is created or any static members are referenced.
  
• A static constructor cannot be called directly.
  
• The user has no control on when the static constructor is executed in the program.
  
• A typical use of static constructors is when the class is using a log file and the constructor is used to write entries to this file.
  
• Static constructors are also useful when creating wrapper classes for unmanaged code, when the constructor can call the LoadLibrary method.
  
  The following Program describes about the static constructor...
  
  

class sample     {          public static int i;          public int j;          static sample()         {             i = 10;             //j = 11; Error:: An object reference is required for the non-static field, method, or property .             Console.WriteLine("static constructor is invoked");         }         public sample()         {             int j = 22;             Console.WriteLine("Non Static Constructor is invoked");         }                 }                                                           class Program     {                static void Main(string[] args)         {             Console.WriteLine("i value is " + sample.i);          // Static constructor is called before object creation.             sample obj = new sample();             Console.WriteLine("J value is " + obj.j);             Console .Read();         }     } Output: static constructor is invoked i value is 10 Non Static Constructor is invoked J value is 0