c# - EntityFramework SqlQuery ToList() -


why getting error on query? have used format in other projects without issue.

    var history = db.database.sqlquery<referralhistory>("dbo.getreferralhistory @quoteguid, @username",         new sqlparameter("@quoteguid", quoteguid),         new sqlparameter("@username", username))         .tolist();

it doesn't tolist().

severity code description project file line error cs1061 'dbrawsqlquery' not contain definition 'tolist' , no extension method 'tolist' accepting first argument of type 'dbrawsqlquery' found (are missing using directive or assembly reference?)

i want results of stored procedure fill list<> of object type, matches output results of stored procedure.

i missing system.linq namespace. creating simple test application , including system.linq 

db.database.sqlquery<class1>("storedproc_test @foo", new sqlparameter("@foo", foo) ).tolist();

compiles fine. removing system.linq gives error getting.


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