EF with XML properties

app.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
  </startup>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="mssqllocaldb" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
  <connectionStrings>
    <add name="Model" connectionString="data source=(LocalDb)\v11.0;initial catalog=EfWithXmlConsoleApplication.Model;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework" providerName="System.Data.SqlClient" />
  </connectionStrings>
</configuration>

EfWithXmlConsoleApplication.cs

using System;
using System.ComponentModel.DataAnnotations.Schema;
using System.IO;
using System.Xml;
using System.Xml.Serialization;
using System.Data.Entity;

namespace EfWithXmlConsoleApplication
{
    class Program
    {
        private static void Main(string[] args)
        {
            using (var db = new Model())
            {
                db.MyEntities.Add(new MyEntity
                {
                    Name = "RhysTest",
                    Address = new Address
                                {
                                    StreetLine1 = "17 honey lane",
                                    City = "Wellington",
                                    PostCode = "WashDC",
                                    Country = "UK"
                                }
                });
                db.SaveChanges();
            }

            using (var db = new Model())
            {
                foreach (var ent in db.MyEntities)
                {
                    Console.WriteLine(ent);
                }
            }
            Console.ReadLine();
        }
    }

    public class Model : DbContext
    {
        public Model()
            : base("name=Model")
        {
            Database.SetInitializer(new DropCreateDatabaseIfModelChanges<Model>());
        }
        public virtual DbSet<MyEntity> MyEntities { get; set; }
    }

    public class MyEntity
    {
        private static readonly XmlSerializer Serializer = new XmlSerializer(typeof(Address));

        public int Id { get; set; }
        public string Name { get; set; }
        [Column(TypeName = "xml")]
        public string AddressData { get; protected set; }
        [NotMapped]
        public Address Address
        {
            get
            {
                using (var textWriter = new StringReader(AddressData))
                {
                    return Serializer.Deserialize(textWriter) as Address;
                }
            }
            set
            {
                using (var textWriter = new StringWriter())
                {
                    using (var xmlWriter = XmlWriter.Create(textWriter))
                    {
                        Serializer.Serialize(xmlWriter, value);
                    }
                    AddressData = textWriter.ToString();
                }
            }
        }

        public override string ToString()
        {
            return string.Format("Id: {0}, Name: {1}, Address: {2}", Id, Name, Address);
        }
    }

    public class Address
    {
        public string StreetLine1 { get; set; }
        public string City { get; set; }
        public string PostCode { get; set; }
        public string Country { get; set; }

        public override string ToString()
        {
            return string.Format("StreetLine1: {0}, City: {1}, PostCode: {2}, Country: {3}", StreetLine1, City, PostCode, Country);
        }
    }
}

packages.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="EntityFramework" version="6.1.1" targetFramework="net45" />
</packages>

Consider a base class also

public abstract class MyEntityBase<T> where T : class
    {

        public int Id { get; set; }
        public string Name { get; set; }
        protected abstract XmlSerializer Serializer { get; }

        [Column(TypeName = "xml")]
        public string PayloadData { get; protected set; }

        [NotMapped]
        public T Payload
        {
            get
            {
                using (var textWriter = new StringReader(PayloadData))
                {
                    return Serializer.Deserialize(textWriter) as T;
                }
            }
            set
            {
                using (var textWriter = new StringWriter())
                {
                    using (var xmlWriter = XmlWriter.Create(textWriter))
                    {
                        Serializer.Serialize(xmlWriter, value);
                    }
                    PayloadData = textWriter.ToString();
                }
            }
        }
    }