How to retrieve the records from more than one table which has one to many relationship?

How to retrieve the records from more than one table which has one to many relationship.

Categories[table]
CategoryId
CategoryName

Products[table]
ProductId
CategoryId
ProductName
Description

Entites

 Category[Entity]
 CategoryId开发者_Python百科
 CategoryName
 List<Product>

Product[Entity]
ProductId
ProductName
Description

So if i give categoryId, i should get the category details with list of products associated with the category.

How to do this in linq to sql?

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In linq to sql you get a reference property generated in each of your entities. This said if you do this:

Category cat = context.Categories.FirstOrDefault(x=>x.CategoryId == 1); //Where one is the //id of a random category
foreach(Product prd in cat.Products)
{
//do some logic here
}

you will get all the products.

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See Include for LINQ to SQL