public static DoubleDescription<CabUser> OperationAmountAll = Aspect.Of<DoubleDescription<CabUser>>(
    "OperationAmountAll", d =>
    {
        d.DisplayName = "Сумма";
        d.IsRequired = false;
        d.IsReadOnly = true;
        d.EmptyValuePredicate = o => o.OperationAmountAll == null;
        d.Getter = o => o.OperationAmountAll.Value;
        d.Setter = (o, v) => o.OperationAmountAll = v;
    });

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
                   assembly="Domain"
                   namespace="Domain">
  <class name="CabUser" table="CabUsers">
    <id name="Id" column="Id">
      <generator class="native" >
        <param name="sequence">CabUsers_ID_seq</param>
      </generator>
    </id>
    <property name="Login"/>
    <property name="Password"/>
    <property name="RegisterDateTime"/>
    <property name="Blocked"/>
    <property name="AllowPayment"/>
    <property name="OperationPhone"/>
    <property name="OperationAmountAll"/>    
  </class>
</hibernate-mapping>