Implement a check that all data contracts has a default constructor

[LosManos]

When deserialising an object in dotnet, the default (Microsoft's) solution is to create the object with its default constructor and then set property after property. This requires a default constructor.

Add a way to get all data contract classes. For example through naming convention "xxxDataContract" their namespace "MyProject.DataContracts" or having a [DataContract] attribute. (is Microsoft's data contract attribute called DataContract?)

Which project? Meta?

[LosManos]

Reopened due to premature closing due to misunderstanding of github gui.