c# - Enum with underlying type. Returning the string representation unintentionally

I have the following enum:

 public enum BikeType : byte
  {
    Road = 0,
    Mountain = 1
  };

When I try to pass it to a I retrieve the 'string' representation of the byte, not the numeric value:

string str = string.Format("Road bike has a byte value of {0}", BikeType.Road);

"Road bike has a byte value of Road"

I want the byte value (0). What am I doing wrong?

Thanks

Answer

You need to do casting to int

string str = 
          string.Format("Road bike has a byte value of {0}", (int)BikeType.Road);

If you don't cast it it will call ToString on BikeType.Road which will return Road