Round nullable decimal to 5 decimal places

Question

vol = Decimal.Round(exposure.Volatility, 5);

This won't let me round

exposure.Volatility

to a decimal b/c it say's conversion from decimal? to decimal cannot take place.

How do I round that number to 5 decimal places? It's a nullable decimal.

Answer 1

Assuming a null value is equal to zero in this circumstance, something like:

vol = exposure.Volatility.HasValue ? Decimal.Round(exposure.Volatility.Value, 5) : 0;

If "vol" is also nullable then do:

vol = exposure.Volatility.HasValue ? Decimal.Round(exposure.Volatility.Value, 5) : null;