Collection Initializers

Added in .NET 3.5
This provides a shortened syntax that enables you to create a collection and populate it with an initial set of values

var myChildren = new List<Person> 
{ 
   new Person { Name = "Lisa"; } 
   new Person { Name = "Richard"; } 
} 

List<int> mylist = new List<int> {0,1,2,3,4,5}; 

This was added to VB.Net in Visual Studio 2010.