vb.net - LINQ-to-SQL Generic GetByIDs method -

i'm using object it's primary key value.

i'm trying find way create similar method getbyids can pass ienumerable(of object) , ids.contains(pk), there's no contains expression.

anyone know how this?

public function getbyid(of t class)(byval pk object) t     dim itemparam = expression.parameter(gettype(t), "item")     return gettable(of t).single(         expression.lambda(of func(of t, boolean))(             expression.equal(                 expression.property(itemparam, getprimarykeyname(of t)),                 expression.constant(pk)                 ),             new parameterexpression() {itemparam}             )         ) end function  public function getprimarykeyname(of t)() string     return mapping.gettable(gettype(t)).rowtype.identitymembers(0).name end function 

you need use expression.call

update - different overload

expression.call(typeof(enumerable),                 "contains",                 new type[] { expression.constant(...).type }                 expression.property(...),                 expression.constant(...));