Entityframework model diagram not showing
Sometimes when opening your entityframework model you’ll notice that none of the entities show in the diagram.
No amount of deleting or adding them again will work. Then try this.
Right click on the diagram and select ‘Move diagrams to Seperate file’.
In your solution explorer you will see a new file created, with the extension edmx.diagram.
Delete this file. Save the project and reopen your model diagram, the entity objects should now show.