Accessing properties of anonymous/dynamic types across dll boundaries gives RuntimeBinderException

Question

In the following sample, x.propertyX works fine, whereas y.propertyX gives me a Microsoft.CSharp.RuntimeBinder.RuntimeBinderException, com

Answer 1

Anonymous types are internal to the assembly they are created in. If you have control over the source code you can make them Friend Assemblies

[assembly:InternalsVisibleTo("TheOtherAssembly")]

but there are drawbacks.