stateless. A stateless server is one which treats each request as an independent transaction, unrelated to any previous request. This simplifies the server design because it does not need to allocate storage to deal with conversations in progress or worry about freeing it if a client dies in mid-transaction.
An expression in a programming language is a combination of one or more explicit values, constants, variables, operators, and functions that the programming language interprets (according to its particular rules of precedence and of association) and computes to produce (to return, in a stateful environment) another value.
1 Lambda Expression is a shorter way of representing anonymous method. 2  Lambda Expression can have zero parameter. 3  Lambda Expression can have multiple parameters in parenthesis  (). Lambda Expression can have multiple statements in body expression in curly brackets {}.