Rounding Off

Question

what is the output of the following statements : Console.WriteLine(decimal.Round(Convert.ToDecimal("0.05"), 1)); --0.0-- Console.WriteLine(decimal.Round(Convert.ToDecimal("0.15"), 1)); --0.2-- Inference: 5 at 2nd decimal place is rounded to 1 if first decimal places is non-zero else zero Why? How are decimal maintained by .net