https://en.wikipedia.org/wiki/Short-circuit_evaluation[Short-circuit evaluation] is an evaluation strategy for https://en.wikipedia.org/wiki/Logical_connective[Boolean operators], that doesn't evaluates the second argument of the operator if it is not needed to determine the result of the operation.
C# provides logical operators that implement short-circuit evaluation: `&&` and `||`, as well as non-short-circuit versions: `&` and `|`. Unlike short-circuit operators, non-short-circuit ones evaluate both operands and afterwards perform the logical operation.
For example `false && FunctionCall()` always results in `false`, even when `FunctionCall` invocation would raise an exception. Instead, `false & FunctionCall()` also evaluates `FunctionCall()`, and results in an exception if `FunctionCall()` invocation raises an exception.
Similarly, `true || FunctionCall()` always results in `true`, no matter what the return value of `FunctionCall()` would be.
The use of non-short-circuit logic in a boolean context is likely a mistake - one that could cause serious program errors as conditions are evaluated under the wrong circumstances.
