如何从有序的实体集合中查询每一个第n个值?

不是在L2S里,但你可以用 ExecuteStoreQuery :

您需要SQL,例如:

SELECT 
[Project1].[C1] AS [C1], 
[Project1].[DepartmentId] AS [DepartmentId], 
[Project1].[Code] AS [Code], 
[Project1].[DepartmentName] AS [DepartmentName]
FROM ( SELECT [Project1].[DepartmentId] AS [DepartmentId], [Project1].[Code] AS [Code], [Project1].[DepartmentName] AS [DepartmentName], [Project1].[C1] AS [C1], row_number() OVER (ORDER BY [Project1].[DepartmentName] ASC) AS [row_number]
    FROM ( SELECT 
        [Extent1].[DepartmentId] AS [DepartmentId], 
        [Extent1].[Code] AS [Code], 
        [Extent1].[DepartmentName] AS [DepartmentName]
        1 AS [C1]
        FROM [dbo].[Department] AS [Extent1]
    )  AS [Project1]
)  AS [Project1]
WHERE [Project1].[row_number] % 4 = 0          
ORDER BY [Project1].[DepartmentName] ASC

然后编码如下:

var q = Context.ExecuteStoreQuery<Foo>(
    sql, params);