What Does Unchecked Operator Mean?
An unchecked operator, in C#, is an operator used to disable overflow checking during the evaluation of expressions and conversions.
Techopedia Explains Unchecked Operator
An unchecked operator is used with the keyword “unchecked” on an expression and as a statement in a block of code. It sets an execution context in which the most significant bits of the result are discarded on the occurrence of an integer overflow, while execution is continued. The context of unchecked is applicable to the statements enclosed within the “unchecked” statement and not to nested function calls.