LINQ expression that will match multiple bulk inputs [duplicate]

Answer 1

This is similar to @Robert 's answer, but will filter the results to make sure the division and department are the same "pair":

int[] divisons = { 4, 6 }, departments = { 9, 3 };
var members = new[] { new { Division = 1, Department = 2 } }; // just for testing

var query = members.Where(m => divisons.Contains(m.Division) 
                         && departments.Contains(m.Department));

var member = query.AsEnumerable().Where(m => Array.IndexOf(divisons, m.Division) 
                        == Array.IndexOf(departments, m.Department));