[AttributeUsage(ValidOn=AttributeTargets.Method, 
   AllowMultiple=true, 
   Inherited=true)]
public class BeforeGetAttribute : PropertyInterceptorAttribute, System.Runtime.InteropServices._Attribute  

public partial class Customer {

  // Sample signatures for a BeforeGet method for any Customer property
  // (invoked for both simple and navigation properties).
  // Additional signatures are possible.

  // Signature 1 - accept a property value and return a property value.
  // The input value may be null if no prior BeforeGet interceptors 
  // have returned a value.
  // Any value returned is passed to next interceptor.
  [BeforeGet]
  public object BeforeGetAnyCustomerProperty1(object value) {
    Console.WriteLine("Getting a customer property 1");
    return value;
  }

  // Signature 2 - accept a property value, but no return value.
  [BeforeGet]
  public void BeforeGetAnyCustomerProperty2(object value) {
    Console.WriteLine("Getting a customer property 2");
  }

  // Signature 3 - accept base IPropertyInterceptorArgs.
  // Allows you to cancel further actions and modify the Value.
  // No property information available.
  [BeforeGet]
  public void BeforeGetAnyCustomerProperty3(IPropertyInterceptorArgs args) {
    Console.WriteLine("Getting a customer property 3");
  }

  // Signature 4 - accept EntityProperty interceptor arguments.
  // The arguments passed allow you to determine the property retrieved
  // and to cancel the get if necessary.  The args.Value may be null
  // if no prior BeforeGet interceptor has set the value.  args.Value
  // can also be set before returning.
  [BeforeGet]
  public void BeforeGetAnyCustomerProperty4(IEntityPropertyGetInterceptorArgs args) {
    Console.WriteLine("Getting customer property " + args.EntityProperty.Name);
  }

  // Signature 5 - accept strongly-typed IPropertyInterceptorArgs.
  // Same features as IPropertyInterceptorArgs but Instance is now strongly-typed.
  [BeforeGet]
  public void BeforeGetAnyCustomerProperty5(IPropertyInterceptorArgs<Customer, object> args) {
    Customer c = args.Instance;
    Console.WriteLine("Getting customer property 5");
  }
}