Add table to database using entity framework

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ASP.NET4

entity-framework

Is it possible to add an entity to a database. Initially I have updated a database from a model, now I created a new entity on the model, now I would like to add this entity to the database. How can I do this

Initial look of my edmx is as follows

http://imageshack.us/photo/my-images/194/samplegk.jpg/[^]

I added an entity by right clicking and select add entity and mapped accordingly as per required, now my edmx looks as follows

http://imageshack.us/photo/my-images/72/sample1s.jpg/[^]

Now I would like to update this table DeptHead to the database