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RestrictionOperators
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Linq3:
var expensiveInStockProducts = from product in products where product.UnitPrice > (decimal)3.0 select product;

Linq4:
var waCustomers = from customer in customers where customer.Region == "WA" select customer;

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OrderingOperators
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Linq30:
var sortedProducts = from product in products orderby product.ProductName select product;

Linq32:
var sortedDoubles = from double_ in doubles orderby double_ select double_;