.Net 1.1 and System.Math.Round -- Banker's Round and .5

The provided Math.Round function implements "bankers rounding", which rounds to the nearest even number when a number ends in .5

 

This means that both 1.5 and 2.5 round to 2.  This is not what most e-commmerce and real-world implementations need.  Here is a "normal" or "US round" function.

 

 

/// <summary>

/// Rounds the specified to round.

/// </summary>

/// <param name="toRound"> To round.</param>

/// <param name="digits"> The digits.</param>

/// <returns></returns>

namepsace MathUtils {

 public static decimal Round( decimal toRound, int digits ) {

   toRound *= (decimal )(Math.Pow(10d,(double)digits));

   if( toRound - Decimal.Truncate(toRound) >= .5m ) {

      toRound += 1;

   }

   toRound = Decimal.Truncate(toRound);

   toRound /= (decimal)( Math.Pow(10d,(double)digits));

   return toRound;

 }

}