class Program
{
    static void Main(string[] args)
    {
        using (var context = new Database1Entities())
        {
            var products = context.Products;

            PrintData(products);

            var prod = products.First();
            prod.Name = "Shirts";
            var result = context.SaveChanges();

            Console.WriteLine();
            Console.WriteLine("'result' = " + result);
        }

        using (var context = new Database1Entities())
        {
            var products = context.Products;

            PrintData(products);
        }

        Console.ReadLine();
    }

    private static void PrintData(DbSet<Product> products)
    {
        Console.WriteLine();
        foreach (var p in products)
        {
            Console.WriteLine(p.Name);
        }
    }
}

Output:
Hats
Gloves
Mittens
Scarves
Boots
Shoes

'result' = 1

Shirts
Gloves
Mittens
Scarves
Boots
Shoes