CSharp - Create Anonymous Types

Introduction

An anonymous type has no name and is generated by the compiler based on the initialization of the object.

The anonymous type is used when projecting new data types using the Select or SelectMany operators.

The following code does the Instantiating and Initializing an Anonymous Type Using Object Initialization

We added that last call to the Console.WriteLine method just so you can see the internal compiler-generated name for the anonymous class.

Here are the results:

Demo

using System;  
using System.Linq;  
class Program/*from   w w w.ja  v a 2s . c o m*/
{
    static void Main(string[] args)
    {
        var address = new {  
                        address = "105 Elm Street",  
                        city = "Atlanta",  
                        state = "GA",  
                        postalCode = "30339"  
                      };  
          
        Console.WriteLine("address = {0} : city = {1} : state = {2} : zip = {3}",  
          address.address, address.city, address.state, address.postalCode);  
          
        Console.WriteLine("{0}", address.GetType().ToString());  
    }
}

Result

Related Topic

• Query Expressions
• Collection Initialization on List
• Returning IEnumerable<T>, Yielding, and Deferred Queries
• Returning a List So the Query Is Executed Immediately and the Results Are Cached
• Using One of the Func Delegate Declarations
• Query with Intentional Exception Deferred Until Enumeration
• Use the var Keyword When Confused
• XML Query Using LINQ to XML
• Database Query Using LINQ to SQL
• Converting an Array of Strings to Integers and Sorting It
• Get SQL query via DataContext Log
• Create extension for string to convert string to double and bool
• LINQ to Objects Query
• Query Results Changing Between Enumerations

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