Web Notes

When we use the Entity Framework (EF) in multilayer information systems sometimes we want to extend classes generated by EF by adding some common properties or functions. Such operation can`t be conduct on *.edmx data model so we need to make some improvement in our solution. Let`s begin... Lets assumed that in our soulution we have only three layer (three project): Client console application which has reference to the second layer  - ' ConsoleApplication ' project name Class library project with class interfaces only - ' Interfaces ' project name Class library class implementation and data model referenced to 'Interfaces' project - ' Classes ' project name. Picture 1. Solution structure. Now when we have all solution structure we can focus on data model. In the ' Classes ' project we create a new folder named ' Model ' and inside add new item of ADO.NET Entity Data Model named ' Learning.edmx ' - it may be empty