Unary

Integer,

Decimal

When prefixing a numeric expression, increments the expression value by 1 and returns the incremented value:

var x = 1;

var y = ++x; // x == 2, y == 2

When following a numeric expression, increments the expression value by 1 but returns the prior (un-incremented)

value:

var x = 1;

var y = x++; // x == 2, y == 1

Integer,

Decimal

When prefixing a numeric expression, decrements the expression value by 1 and returns the decremented value:

var x = 1;

var y = --x; // x == 0, y == 0

When following a numeric expression, decrements the expression value by 1 but returns the prior (un- decremented) value:

var x = 1;

Returns the CLR System.Type instance that corresponds to the operand:

var x = 1.1;