F# Query Expression “The field, constructor or member 'Contains' is not defined”
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13-07-2021 - |
Question
I'm trying to get this example from the Query Expressions page to work. I've got the database setup and I've made many small bits of code work.
let idQuery = query { for id in [1; 2; 5; 10] do
select id }
query {
for student in db.Student do
where (idQuery.Contains(student.StudentID))
select student
}
But all I get is the error:
The field, constructor or member 'Contains' is not defined
What am I missing? I've got other examples to work.
Solution
I needed to have the System.Linq
namespace imported.
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