Multiplying a double value by 100.0 introduces rounding errors?

Question

This is what I am doing, which works 99.999% of the time:

((int)(customerBatch.Amount * 100.0)).ToString()

The Amount value is a double. I

Answer 1

You really should not be using a double value to represent currency, due to rounding errors such as this.

Instead you might consider using integral values to represent monetary amounts, so that they are represented exactly. To represent decimals you can use a similar trick of storing 580.55 as the value 58055.