Chapter 108: Checked and Unchecked

Section 108.1: Checked and Unchecked

C# statements executes in either checked or unchecked context. In a checked context, arithmetic overflow raises an exception. In an unchecked context, arithmetic overflow is ignored and the result is truncated.

If neither of these are specified then the default context will rely on other factors, such as compiler options.

Section 108.2: Checked and Unchecked as a scope

The keywords can also create scopes in order to (un)check multiple operations.

short m = 32767; short n = 32767; checked

{

int result1 = (short)(m + n); //will throw an OverflowException

}

unchecked

{

int result2 = (short)(m + n); // will return -2

}