Issue on Dispose when using a Mock on WebClient and Strict behavior

[MarienMonnier]

What steps will reproduce the problem?

Using this code :

Mock<WebClient> mockWebClient = new Mock<WebClient>(MockBehavior.Strict);
mockWebClient.Protected().Setup("Dispose", ItExpr.IsAny<bool>());
using (WebClient client = mockWebClient.Object))
{
}

What is the expected output? What do you see instead?
It should work without error. But starting with the version 4.2.1408.619, I have an exception:

Test method XXX threw exception: 
Moq.MockException: IDisposable.Dispose() invocation failed with mock behavior Strict.
All invocations on the mock must have a corresponding setup.
Result StackTrace:  
at Moq.ExtractProxyCall.HandleIntercept(ICallContext invocation, InterceptorContext ctx, CurrentInterceptContext localctx)
   at Moq.Interceptor.Intercept(ICallContext invocation)
   at Moq.Proxy.CastleProxyFactory.Interceptor.Intercept(IInvocation invocation)
   at Castle.DynamicProxy.AbstractInvocation.Proceed()
   at Castle.Proxies.WebClientProxy.Dispose()
   at ...

The problem being that I can't mock the Dispose() method, it's not virtual. The Dispose method calls the protected virtual Dispose(bool) method, so my way should be the correct one.

What version of the product are you using? On what operating system?
Works correctly with versions (from nuget): 4.2.1312.1622, 4.2.1402.2112
Doesn't work with versions: 4.2.1408.619, 4.2.1408.717 (latest ATM)
My operating system is Windows 7, I tested with Frameworks 4, 4.5 and 4.5.1

Please provide any additional information below.
/

Thank you

[drieseng]

You should be using this:

mockWebClient.As< IDisposable >().Setup(p => p.Dispose());

[kzu]

Indeed.

[aleks091]

Thanks ! @drieseng