This .NET class wraps the AcDb::RotationAngle ObjectARX enum. 

It specifies the text rotation angle within table cells.

Public Enum RotationAngle
  Degrees000 = 0
  Degrees090 = 1
  Degrees180 = 2
  Degrees270 = 3
  DegreesUnknown = -1
End Enum

public enum RotationAngle {
  Degrees000 = 0,
  Degrees090 = 1,
  Degrees180 = 2,
  Degrees270 = 3,
  DegreesUnknown = -1
}