What are anonymous types in C #?

Anonymous types are types created on the fly, typically to return results to a LINQ statement. Here is an example from MSDN

var productQuery = 
    from prod in products
    select new { prod.Color, prod.Price };

      

        
        
        
      

    

A new type is created with read-only Color and Price properties, and the query returns instances of that type when enumerated.

foreach(var product in productQuery) {
    Console.WriteLine(product.Color);
}

      

        
        
        
      

    

product

will be of the anonymous type defined above.

Anonymous types are useful for returning multiple properties from a query without having to explicitly specify the type for this purpose.