C# 6.0 introduces the concept of auto property initializer as we discussed in another blog post here

Also another feature is deferring the initialization of read-only property from constructor. This feature is available in most recent version of CTP

public class Person
    {
        public string FirstName { get; }

        public string LastName { get; }

        public Person(string firstName , string lastName)
        {
            FirstName = firstName;
            LastName = LastName;
        }
    }