public enum FlowDir| NoFlow | 0 | Flow is standing still. This flag is not used, in case of no water level difference, PositiveFlow is set. |
| PositiveFlow | 1 | Positive flow direction. I.e. flow towards higher chainage. |
| NegativeFlow | -1 | Negative flow direction. I.e. flow towards lower chainage. |
| IsOneOf |
Returns true if enumeration is one of the listed ones.
(Defined by GenericExtensions) |