How to initialize a structure : Struct initialization : Struct C# Examples

    
using  System;  
  
//  Define  a  structure.  
struct  Book  {  
    public  string  author;  
    public  string  title;  
    public  int  copyright;  
  
    public  Book(string  a,  string  t,  int  c)  {  
        author  =  a;  
        title  =  t;  
        copyright  =  c;  
    }  
}  
  
class  MainClass  {  
    public  static  void  Main()  {  
        Book  book1  =  new  Book("author",  "Book  name",  2005);
  
        Book  book2  =  new  Book();  //  default  constructor  
        Book  book3;  
  
        Console.WriteLine(book1.title  +  "  by  "  +  book1.author  +  ",  (c)  "  +  book1.copyright);  
        Console.WriteLine();  
  
        if(book2.title  ==  null)  
            Console.WriteLine("book2.title  is  null.");  

        book2.title  =  "title";  
        book2.author  =  "author";  
        book2.copyright  =  1932;  
        Console.Write("book2  now  contains:  ");  
        Console.WriteLine(book2.title  +  "  by  "  +  book2.author  +  ",  (c)  "  +  book2.copyright);  
  
        Console.WriteLine();  
  
        //  Console.WriteLine(book3.title);  //  error,  must  initialize  first  
        book3.title  =  "Red  Storm  Rising";  
  
        Console.WriteLine(book3.title);  //  now  OK  
    }  
}