We are in the process of upgrading a site of one of our clients from CS 2009 to CS 11.2. The project contains some custom pipeline components and while compiling these I got the following error messages:
error CS1752: Interop type 'CommerceServer.Core.Runtime.DictionaryClass' cannot be embedded. Use the applicable interface instead.
error CS0143: The type 'CommerceServer.Core.Runtime.DictionaryClass' has no constructors defined
The line that gave the error was this line:
return new CommerceServer.Core.Runtime.DictionaryClass();
It turns out this is quite easy to solve.
Here is an explanation of what is happening: http://blogs.msdn.com/b/mshneer/archive/2009/12/07/interop-type-xxx-cannot-be-embedded-use-the-applicable-interface-instead.aspx
Solution is either:
- Take of the
- Don't embed the interop assemblies by changing this in the project reference;