Use stored procedure with linq to sql

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SQL

LINQ

Hi I use the following stored procedure, but i do not know how i can use this with Linq to Sql.

I use the normal stored procedure with Linq to Sql, but this stored procedure retrieves data based on two tables.
How can I do this with Linq to Sql?
Please help me. Thanks in advance.

ALTER PROCEDURE dbo.PackageTestForPerform
        (
        @Package_ID int,
        @Patient_ID nvarchar(50)
        )
        
AS
select t.dep_name,t.test_name,t.sub_test_name,
CASE WHEN 
ISNULL((
        SELECT COUNT(*) 
        from Patient_Package_Test p
        where patient_Id=@Patient_ID and p.test_code=t.test_code and p.Sub_Test_id=t.Sub_Test_code
),0)>0 THEN 'TRUE' ELSE 'FALSE' END AS [Status]
from packagetest t 
where package_ID=@Package_ID