#649 – Creating an Anonymous Type

An anonymous type is a temporary data type that is inferred based on the data that you include in an object initializer.

We can use object initializer syntax to initialize an object:

Dog kirby = new Dog { Name="Kirby", Age=14 };

We can use the same syntax to initialize an object where we don’t mention a particular data type.  For example, we can declare/initialize an object that contains some information about a movie.

var movie = new { Title = "North By Northwest", Year = 1959, Director = "Alfred Hitchcock" };

Notice that we haven’t created a Movie class, but we now have an object that represents a movie which has three properties–Title, Year and Director.

The compiler has actually created a temporary “anonymous” type to represent the movie object.  Note also that the movie variable is implicitly typed (var keyword)since we don’t have a named type.


About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

2 Responses to #649 – Creating an Anonymous Type

  1. Pingback: #803 – Situations When You Might Use the var Keyword | 2,000 Things You Should Know About C#

  2. Pingback: #833 – Some Examples of Anonymous Object Initializers | 2,000 Things You Should Know About C#

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