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asp.net MVC

Object reference not set to an instance of an object | Opening edmx file [Solved]

| | ASP-NET , MVC

While I tried to open the .edmx file in asp.net mvc project. I got this following error.
"object reference not set to an instance of an object"

Object reference not set to an instance of an object

Solution:

To resolve this problem just closing the project and re-opening it. Then try opening the edmx file, it will open without error.

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