Saturday, 21 January 2012

CSharp,Anonymous types in C# 3.0



Anonymous types in C# 3.0

1. Anonymous types are new feature being added in C# 3.0.
2. These are data types being generated on the fly at the run time.
3. These data types are generated through complier rather than explicit class definition.
Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace ConsoleApplication17
{
    class Program
    {
        static void Main(string[] args)
        {
 
            var MyAnonClass = new
            {
                Name = "Scott",
                Subject = "ASP.Net"
 
            };
 
 
            Console.WriteLine(MyAnonClass.Name);
            Console.Read();
 
 
        }
    }
}
 
Output
clip_image002
A class without name is being generated and assigned to implicitly type local variable
How it works internally?
1. For an anonymous type syntax compiler generates a class.
2. Properties of the complier generated class are value and data type given in declaration.
3. Intellisense supports anonymous type class properties.
clip_image003
4. Properties of one anonymous type can be used in declaration of another anonymous type.
clip_image004
Program.cs



using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication17
{
    class Program
    {
        static void Main(string[] args)
        {
            var MyAnonClass = new
            {
                Name = "Scott",
                Subject = "ASP.Net"
            };
            Console.WriteLine(MyAnonClass.Name);
            Console.Read();
            var SecondAnoynClass = new
            {
                info = MyAnonClass.Name + MyAnonClass.Subject
            };
            Console.WriteLine(SecondAnoynClass.info);
            Console.Read();
            Console.Read();
        }
    }
}

Output
clip_image006
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