How to round a decimal for output?

Question

Using C#, I want to format a decimal to only display two decimal places and then I will take that decimal and subtract it to another decimal. I would like to be able to do t

Answer 1

If you don't want to round the decimal, you can use Decimal.Truncate. Unfortunately, it can only truncate ALL of the decimals. To solve this, you could multiply by 100, truncate and divide by 100, like this:

decimal d = ...;
d = Decimal.Truncate(d * 100) / 100;

And you could create an extension method if you are doing it enough times

public static class DecimalExtensions
{
  public static decimal TruncateDecimal(this decimal @this, int places)
  {
    int multipler = (int)Math.Pow(10, places);
    return Decimal.Truncate(@this * multipler) / multipler;
  }
}