The entity cannot be constructed in a LINQ to Entities query

There is an entity type called Product that is generated by entity framework.
I have written this query

public IQueryable GetProducts(int categoryID)
{
    return from p in db.Products
           where p.CategoryID== categoryID
           select new Product { Name = p.Name};
}

The code below throws the following error :

"The entity or complex type Shop.Product cannot be constructed in a
LINQ to Entities query"

var products = productRepository.GetProducts(1).Tolist();

But when I use select p instead of select new Product { Name = p.Name}; it works correctly.

How can I preform a custom select section?

You cannot (and should not be able to) project onto a mapped entity. You can, however, project onto an anonymous type or onto a DTO:

public class ProductDTO
{
    public string Name { get; set; }
    // Other field you may need from the Product entity
}

And your method will return a List of DTO's.

public List GetProducts(int categoryID)
{
    return (from p in db.Products
            where p.CategoryID == categoryID
            select new ProductDTO { Name = p.Name }).ToList();
}

Stack Overflow Q#5325797, score: 435