F

false

A Boolean literal.

finally

The part of a try statement that is always executed when control leaves the scope of the try block.

fixed

A statement to pin down a reference type so that the garbage collector won't move it during pointer arithmetic operations.

float

A four-byte floating-point datatype.

for

A loop statement that combines an initialization statement, stopping condition, and iterative statement into one statement.

foreach

A loop statement that iterates over collections that implement IEnumerable .