Convert String Fraction to Decimal

public static decimal FractionToDouble(string fraction)
       {
           decimal result;

           if (decimal.TryParse(fraction, out result))
           {
               return result;
           }

           string[] split = fraction.Split(new char[] { ' ', '/' });

           if (split.Length == 2 || split.Length == 3)
           {
               decimal a, b;

               if (decimal.TryParse(split[0], out a) && decimal.TryParse(split[1], out b))
               {
                   if (split.Length == 2)
                   {
                       return (decimal)b / a;
                   }

                   int c;

                   if (int.TryParse(split[2], out c))
                   {
                       return a + (decimal)b / c;
                   }
               }
           }

           throw new FormatException("Not a valid fraction.");
       }
       public static int ReadAllBytesFromStream(Stream stream, byte[] buffer)
       {
           // Use this method is used to read all bytes from a stream.
           int offset = 0;
           int totalCount = 0;
           while (true)
           {
               int bytesRead = stream.Read(buffer, offset, 100);
               if (bytesRead == 0)
               {
                   break;
               }
               offset += bytesRead;
               totalCount += bytesRead;
           }
           return totalCount;
       }