Repro steps:
1. Add Empty EDMX
2. Add Two Entities (each with "Id" property)
3. Add inheritance between entities.
4. Add a new L2S class.
5. Build solution.
6. While L2S class is open, double click on "Error 19" in the error grid. (About conflicting "Id" property)
Expected:
Jumps to the EDMX window and highlights the property.
Actual:
Error: "Object reference not set to an instance of an object."
1. Add Empty EDMX
2. Add Two Entities (each with "Id" property)
3. Add inheritance between entities.
4. Add a new L2S class.
5. Build solution.
6. While L2S class is open, double click on "Error 19" in the error grid. (About conflicting "Id" property)
Expected:
Jumps to the EDMX window and highlights the property.
Actual:
Error: "Object reference not set to an instance of an object."