How to make AutoMapper create an instance of class

I have the following source type:

public class Source
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string Address1 { get; set; }
    public string Address2 { get; set; }
    public string City { get; set; }
    public string State { get; set; }
    public string ZipCode { get; set; }
}

I have the following destination types:

public class Destination
{
    public string FirstName { get; set; }
    public string LastName { get; set; }

    public Address HomeAddress { get; set; }
}

public class Address
{
    public string Address1 { get; set; }
    public string Address2 { get; set; }
    public string City { get; set; }
    public string State { get; se开发者_StackOverflow社区t; }
    public string PostalCode { get; set; }
}

I created a mapping:

Mapper.CreateMap<Source, Destination>();

How do I configure my mapping so it will create an instance of Address and map the Address.PostalCode property using the Source property ZipCode?

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With AfterMap, you can specify how to map entities further after AutoMapper has done it's mapping.

Mapper.CreateMap<Source, Destination>()
                .AfterMap((src, dest) =>
                              {
                                  dest.HomeAddress = new Address {PostalCode = src.ZipCode};
                              }
            );