Sounds interesting!!!

Basically it is all about changing the color of entity in designer so that it would be easy for us to identify related groups of entities in the Visual Studio designer.

This enhancement to Entity Framework was done in version 5.0.

class diagram

If you are working with edmx files and you have opened it in designer then to change the color of an entity, right click on the entity in the designer → go to properties (or press F4) → Change the Fill Color property. For example:

Fill Color property
To change color of multiple entities in one go, select multiple entities and change Fill Color for all of them using property window.

This feature has nothing to do with performance aspects as people are asking questions in terms of performance improvement.

When you have a large scale projects and many entities in one edmx file, I am sure this feature will definitely help you to segregate your entities in different modules.

Keep learning …………………. Cheers !!!