public sealed class CircularArcDefinition : BaseCurveDefinition 

// define with a radius, arcLength and chord direction 
var circularArcDef = new CircularArcDefinition
{
  Radius = -201.0,
  ArcLength = 45.29,
  ChordDirection = ParcelUtilities.Instance.ConvertQuadrantBearingDMSToNorthAzimuthDecDeg("N21-47-57W")
};
var cogoCircArc = COGOLineBuilder.CreateCOGOCircularArc(circularArcDef);


// define with a radius, chordLength and tangent direction 
var circularArcDef2 = new CircularArcDefinition
{
  Radius = -201.0,
  ChordLength = 44.0,
  TangentDirection = 340.0
};
var cogoCircArc2 = COGOLineBuilder.CreateCOGOCircularArc(circularArcDef2);

// define with a radius, central angle and radial direction
var circularArcDef3 = new CircularArcDefinition
{
  Radius = -201.0,
  CentralAngle = 44.0,
  RadialDirection = 340.0
};
var cogoCircArc3 = COGOLineBuilder.CreateCOGOCircularArc(circularArcDef3);

List<COGOLine> lstCOGOLines = new();
var direction = ParcelUtilities.Instance.ConvertQuadrantBearingDMSToNorthAzimuthDecDeg("S7-46-51-E");
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOStraightLine(nAzDirection, 61.45)); //1
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOStraightLine(166.2625, 37.22));//2
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOStraightLine(255.2833333, 71.4));//3
var circArcDef = new CircularArcDefinition
{
  Radius = -201.0,
  ArcLength = 45.29,
  ChordDirection = ParcelUtilities.Instance.ConvertQuadrantBearingDMSToNorthAzimuthDecDeg("N21-47-57W")
};
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOCircularArc(circArcDef));//4
var tangentCurveDef = new TangentCurveDefinition
{
  Radius = 169.0,
  ArcLength = 52.40
};
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOCircularArc(tangentCurveDef));//5

tangentCurveDef = new TangentCurveDefinition
{
  Radius = 13.0,
  ArcLength = 22.98
};
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOCircularArc(tangentCurveDef));//6

tangentCurveDef = new TangentCurveDefinition
{
  Radius = -281.0,
  ArcLength = 73.68
};
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOCircularArc(tangentCurveDef));//7

var spatialReference = map?.SpatialReference;
var travParcel = new Traverse(spatialReference);
await travParcel.AddCoursesAsync(lstCOGOLines);
if (travParcel.IsValid())
{
  ; //insert code to use the traverse
}