C#’s bool type (aliasing the System.Boolean type) is a logical value that can be assigned the literal true or false.

Although a Boolean value requires only one bit of storage, the runtime will use one byte of memory, since this is the minimum chunk that the runtime and processor can efficiently work with. To avoid space inefficiency in the case of arrays, the Framework provides a BitArray class in the System.Collections namespace that is designed to use just one bit per Boolean value.