Converting bytes to GB in C#?

Question

I was refactoring some old code and came across the following line of code to convert bytes to GB.

decimal GB = KB / 1024 / 1024 / 1024;

Is

Answer 1

    /// 

/// Function to convert the given bytes to either Kilobyte, Megabyte, or Gigabyte
/// 
/// Double -> Total bytes to be converted
/// String -> Type of conversion to perform
/// Int32 -> Converted bytes
/// 
public static double ConvertSize(double bytes, string type)
{
    try
    {
        const int CONVERSION_VALUE = 1024;
        //determine what conversion they want
        switch (type)
        {
            case "BY":
                 //convert to bytes (default)
                 return bytes;
            case "KB":
                 //convert to kilobytes
                 return (bytes / CONVERSION_VALUE);
            case "MB":
                 //convert to megabytes
                 return (bytes / CalculateSquare(CONVERSION_VALUE));
            case "GB":
                 //convert to gigabytes
                 return (bytes / CalculateCube(CONVERSION_VALUE));
            default:
                 //default
                 return bytes;
          }
     }
     catch (Exception ex)
     {
         Console.WriteLine(ex.Message);
         return 0;
      }
}

/// 

/// Function to calculate the square of the provided number
/// 
/// Int32 -> Number to be squared
/// Double -> THe provided number squared
/// 
public static double CalculateSquare(Int32 number)
{
     return Math.Pow(number, 2);
}


/// 

/// Function to calculate the cube of the provided number
/// 
/// Int32 -> Number to be cubed
/// Double -> THe provided number cubed
/// 
public static double CalculateCube(Int32 number)
{
     return Math.Pow(number, 3);
}

//Sample Useage
String Size = "File is " + ConvertSize(250222,"MB") + " Megabytes in size"