LINQ, where in (Value1, Value2, Value3.) equivalent Statement.

SELECT     ID,Name, ContactTitle, Address,   City, Region, PostalCode, 
Country, Phone  FROM    Author WHERE    Country IN ('UK', 'USA', 'Australia') 

 string[] countries = new string[] { "UK", "USA", "Australia" };  

 var Author =    from c in context.Author s     
                 where countries.Contains(c.Country)     
                 select c; 

string[] countries = new string[] { "UK", "USA", "Australia" };  

 var Author =    Author.Where(c => countries.Contains(c.Country));