Simplifying Code with Anonymous Types in C#

Category > CSHARP || Published on : Tuesday, March 7, 2023 || Views: 13 || C# Anonymous Types Object Initialization Performance Optimization Code Simplification Data Types.

Learn how to create and use anonymous types in C# to simplify your code and improve performance. This article will cover the basics of creating and accessing anonymous types, as well as their benefits and limitations.

Anonymous Types in C#

In C#, Anonymous Types allow developers to define and create objects without needing to define a specific class or data type. This feature was first introduced in C# 3.0 and has since become a powerful tool for creating temporary objects that can be used to simplify code and improve performance.

What are Anonymous Types?

An anonymous type is an object that is defined at runtime without a specific class declaration. Instead of defining a class, we can create an object by using the new keyword and providing the properties and values that we want to assign to the object. The compiler generates a class for the anonymous type based on the properties and their data types that we provide.

Creating Anonymous Types

To create an anonymous type in C#, we use the new keyword followed by an object initializer. For example:

var person = new { Name = "John", Age = 25 };

In the above example, we created an anonymous type with two properties: Name and Age. The data types of these properties are inferred by the compiler based on the values assigned to them.

Accessing Properties of Anonymous Types

We can access the properties of anonymous types using dot notation, just like we would with any other object. For example:


Benefits of Anonymous Types

There are several benefits of using anonymous types in C#. Some of them include:

  • Anonymous types are useful when we need to create temporary objects that will not be used elsewhere in the application.
  • They help to simplify code by reducing the need for creating classes.
  • Anonymous types can improve performance since they eliminate the overhead of creating a new class.

Limitations of Anonymous Types

While anonymous types are useful, they also have some limitations. Some of these limitations include:

  • Anonymous types are read-only, which means that we cannot modify their properties after they have been created.
  • Anonymous types cannot be used as return types for public methods since their type is not defined.
  • Anonymous types cannot be used as parameters in methods since their type is not defined.


Anonymous types in C# are a powerful tool that allows developers to create temporary objects without the need for defining a specific class or data type. They can simplify code and improve performance in some cases, but they also have some limitations that developers should be aware of. By understanding how to use anonymous types, developers can write more efficient and concise code in their applications.