Type Inference Clause Samples

Type Inference. Use it. Less typing is almost always better than more typing, with some important exceptions. Use var when the type is repeated on the right-hand side of the assignment: var users = new Dictionary<UserId, User>(); Dictionary<UserId, User> users = new Dictionary<UserId, User>(); Don’t use var for capturing the return type of a method or property when the type is not evident: var things = Interpret(data); HashMap<Thing> things = Interpret(data); var things = InterpretAs<Thing>(data); Omit the type when using array initializers: database.UpdateUserIds(new int[] { 1, 2, 3 }); database.UpdateUserIds(new [] { 1, 2, 3 });