Linq 如何实现 in 与 not in

Select ProductID, ProductName, CategoryID
From dbo.Products
Where CategoryID in (1, 2)

Select ProductID, ProductName, CategoryID
From dbo.Products
Where CategoryID not in (1, 2)

Select ProductID, ProductName, CategoryID
From dbo.Products
Where not CategoryID in (1, 2)

var queryResult = from p in db.Products
where (new int?[] {1,2}).Contains(p.CategoryID)
select p;

SELECT [t0].[ProductID], [t0].[ProductName], [t0].[SupplierID], [t0].[CategoryID], [t0].[QuantityPerUnit], [t0].[UnitPrice], [t0].[UnitsInStock], [t0].[UnitsOnOrder], [t0].[ReorderLevel], [t0].[Discontinued] 
FROM [dbo].[Products]AS [t0]
WHERE [t0].[CategoryID] IN (@p0, @p1)

var queryResult = from p in db.Products
where ! (new int?[] {1,2}).Contains(p.CategoryID)
select p;

SELECT [t0].[ProductID], [t0].[ProductName], [t0].[SupplierID], [t0].[CategoryID], [t0].[QuantityPerUnit], [t0].[UnitPrice], [t0].[UnitsInStock], [t0].[UnitsOnOrder], [t0].[ReorderLevel], [t0].[Discontinued] 
FROM [dbo].[Products]AS [t0]
WHERE NOT [t0].[CategoryID] IN (@p0, @p1)