WCF server method reported as deserialization gadget

[matterpreter]

See below:

PS > .\InspectAssembly.exe path=".\server.exe"
Assembly Name: C:\foo\server.exe
  WCFServer Gadgets:
    CommunicationObject::Open() is called in the following methods:
      Service.OnStart

  Serialization Gadgets:
    CommunicationObject::Open() is called in the following methods:


PS >