Simple Examples of joining 2 and 3 table using lambda expression

Question

Can anyone show me two simple examples of joining 2 and 3 tables using LAMBDA EXPRESSION(
for example using Northwind tables (Orders,CustomerID,EmployeeID)

Answer 1

public void Linq102() 
{ 

string[] categories = new string[]{  
    "Beverages",   
    "Condiments",   
    "Vegetables",   
    "Dairy Products",   
    "Seafood" };  

List products = GetProductList(); 

var q = 
    from c in categories 
    join p in products on c equals p.Category 
    select new { Category = c, p.ProductName }; 

foreach (var v in q) 
{ 
    Console.WriteLine(v.ProductName + ": " + v.Category);  
} 
}