For an operation of the form x % y, binary operator overload resolution (14.2.4) is applied to select a specific operator implementation. The operands are converted to the parameter types of the selected operator, and the type of the result is the return type of the operator. The predefined remainder operators are listed below. The operators all compute the remainder of the division between x and y. Integer remainder: The result of x % y is the value produced by x -(x / y) * y. If y is zero, a System.DivideByZeroException is thrown. The remainder operator never causes an overflow. Floating-point remainder: The following table lists the results of all possible combinations of nonzero finite values, zeros, infinities, and NaN's. In the table, x and y are positive finite values. z is the result of x % y and is computed as x -n * y, where n is the largest possible integer that is less than or equal to x / y. This method of computing the remainder is analogous to that used for integer operands, but differs from the IEEE 754 definition (in which n is the integer closest to x / y). +y 150y +0 1500 + 150 NaN +x +z +z NaN NaN x x NaN 150x 150z 150z NaN NaN 150x 150x NaN +0 +0 +0 NaN NaN +0 +0 NaN 1500 1500 1500 NaN NaN 1500 1500 NaN + NaN NaN NaN NaN NaN NaN NaN 150 NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN Decimal remainder: If the value of the right operand is zero, a System.DivideByZeroException is thrown. If the resulting value is too large to represent in the decimal format, a System.OverflowException is thrown. If the result value is too small to represent in the decimal format, the result is zero. The scale of the result, before any rounding, is the same as the scale of y, and the sign of the result, if non-zero, is the same as that of x. Decimal remainder is equivalent to using the remainder operator of type System.Decimal.