Class diagrams and tools for communicating with clients

[kirsten greed]

Hello all.
After revisiting "Domain Driven Design"
I want to try using class diagrams to communicate with my client.
However my classes are cluttered with internal properties that are not
relevant to our conversations

I thought of trying interfaces for example


public interface ISnapInModel
{

IBlank Blank { get;  set;  }
        }

public interface IBlank
      {
            public int Height {get;set;}
            public int Width {get;set;}
      }


However when I try to create a class diagram in VS2017 no association draws
between the two interfaces.

Is there a better way?
Thank you