It is a most easy topic of .NET. To over come all the connection problems of ADO.NET we use entity framework.
Many of the beginners like me have doubt of how to update a database when changes are made in it in data base first model.
Here is the solution for it take a look at it and solve your problem.
Select .edmx file in your solution.
Right click on that file and select "UPDATE MODEL FROM DATABASE" option
![update model from database]()
A pop up will be coming like this:
![table]()
Select the new and updated table and click on finish.
In this way we can update data base first entity framework model.
Happy coding guys.