[underwater]

In Programming EF : DbContext (p66) it says "Entity Framework creates the dynamic proxy for change tracking, it will implement the IEntityWithChangeTracker interface".

As a quick test, it suggests using the below code

// Example 3-18. Testing for a change tracking proxy
private static void TestForChangeTrackingProxy()
{
using (var context = new BreakAwayContext())
{
var destination = context.Destinations.First();
var isProxy = destination is IEntityWithChangeTracker;
Console.WriteLine("Destination is a proxy: {0}", isProxy);
}

However, VS2012 seems to raise a warning for the line [var isProxy = destination is IEntityWithChangeTracker;] complaining that : Suspicious type check: there is no type in the solution which is inherited from both (a reference to my class and to IEntityWithChangeTracker"

At runtime although the destination is in fact a generated proxy, the expression (destination is IEntityWithChangeTracker) returns False !

Am I missing anything ?

THanks for any guidance or suggestions.

[JulieLerman]

I've pulled the example in to VS2012 and updated it to EF5. I see this as a compiler warning, but the solution compiles and the method runs as expected.

I've got Resharper running so I don't know if the warning is coming from R# or from Visual Studio. I'm not worried about it. If you want to dig deeper, ask on Stackoverflow and be sure to tag the post as entityframework. The EF team watches SO for EF questions.