You are implementing a method that uses Entity Framework to insert a Product entity. You add the following code:

public void InsertProduct(Product product)
{
using (AdventureWorksEntities context = new AdventureWorksEntities())
{
context.Products.Attach(product);

context.SaveChanges();
}
}

When you execute the code, you find that the product is not inserted. You need to modify the code to ensure that the product is inserted.

What should you do ?

In the Entity Framework, objects can be attached to, or detached from, an object context. Objects that are attached to an object context are tracked and managed by that object context. When a query is executed inside an object context in the Entity Framework, the returned objects are automatically attached to the object context. You can attach objects that have been returned from a remote method call or web service by calling the Attach method. Entities are attached in an Unchanged state. You must call the ChangeObjectState method of the ObjectContext's ObjectStateManager and set the EntityState to Added to ensure that it is marked for insertion.