I've used two from's for inner joins: var filteredCustomers = from c in customers from o in orders where o.customerid = c.customerid &

I've used two from's for inner joins: var filteredCustomers = from c in customers from o in orders where o.customerid = c.customerid && c.IsMale && c.Age > 30 && o.IsPending select new {Customer = c, Order = o}; This is one of those cases where I'll favor query syntax over extensions. OTOH, query syntax requires an explicit `select` where it's often optional in extensions. Also, `.ToList()` doesn't have a query syntax counterpart so you'll often mix both if you tend to favor query.