IPersistenceConfigurer configuration = MsSqlConfiguration.MsSql2012
                                                         .ConnectionString(connectionString)
                                                         .AdoNetBatchSize(1000);

var fluentConfig = Fluently.Configure()
                           .Database(configuration)
                           .ExposeConfiguration(SchemaMetadataUpdater.QuoteTableAndColumns)
                           .Mappings(m => m.FluentMappings.Add(fluentMappingTypes));

// Domain object
public class Foo
{
    public int Id { get; set; }
    public string Name { get; set; }
    public IList<KeyValuePair> Parameters { get; set; }
}

// Mapping class
public class FooMap : ClassMap<Foo>
{
	public FooMap()
	{
		Id(x => x.Id).GeneratedBy.Assigned();
		Map(x => x.Name);
		HasMany(x => x.Parameters)
			.Table("FooParameter")
			.KeyColumn("Foo_id")
			.Component(c =>
			{
				// Without the Column name override trying to save an instance of Foo will fail
				c.Map(x => x.Key).ColumnName("[Key]"));
				c.Map(x => x.Value);
			})
			.Cascade.AllDeleteOrphan();
	}
}