Person.xml

<?xml version="1.0" encoding="utf-8" ?>
<Entity Name="Person" Namespace="ConsoleApp1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:noNamespaceSchemaLocation="../../ThuCommix.EntityFramework/Entity.xsd">
    <Fields>
        <Field Name="FirstName" FieldType="string" Mandatory="true" MaxLength="50" Cascade="None" />
        <Field Name="Name" FieldType="string" Mandatory="true" MaxLength="50" Cascade="None" />
        <Field Name="Age" FieldType="int" Mandatory="false" Cascade="None" />
        <Field Name="IsLegalAge" FieldType="bool" Mandatory="false" Cascade="None" />
    </Fields>
    <ListFields>
        <ListField Name="Addresses" FieldType="Address" ReferenceField="Person" Cascade="SaveDelete" />
    </ListFields>
    <VirtualFields>
        <VirtualField Name="FullName" FieldType="string" Expression="$&quot; {Name}, {FirstName}&quot;" />
    </VirtualFields>
    <VirtualListFields>
        <VirtualListField Name="ValidAddresses" FieldType="Address" Expression="Addresses.Where(x =&gt; x.IsValid).ToList()" />
    </VirtualListFields>
</Entity>