Value does not fall within expected range

[KiroAndreev1]

I use Arcgis runtime for net 100.2 and create C#/WPF application.

I developed custom circle (code of circle is) :

double slice = 2 * Math.PI / 360;
Esri.ArcGISRuntime.Geometry.PointCollection pcol = new Esri.ArcGISRuntime.Geometry.PointCollection();
Polyline polyline = new Polyline(points_Circle);
double radius = Convert.ToDouble(GeometryEngine.Length(polyline));
double sliceRadius = 0.07;
double radian = Math.Acos((radius - sliceRadius) / radius);
double angle = radian * (180 / Math.PI);
//Calcuate tendon
double tendon = radius * Math.Sin(angle);
if (tendon < 0.1)
{
tendon = 0.1;
angle = Math.Asin(0.1 /radius);
}
for (double i = 0; i <= 360; i += angle)
{
double rad = slice * i;
double px = points_Circle[0].X + radius * Math.Cos(rad);
double py = points_Circle[0].Y + radius * Math.Sin(rad);
pcol.Add(new MapPoint(px, py));
}
Polyline p = new Polyline(pcol);
// Create the graphic with polyline and symbol
Graphic graphicPoly = new Graphic(p, lineSymbol);

Image of circle is:

When intersect this circle with rectangle (code of rectangle is):

  var rectangle = await MyMapView.SketchEditor.StartAsync(SketchCreationMode.Rectangle, false);

appear next message:

How to solved this problem?

[dotMorten_esri]

I don't see you ever assigning a spatial reference to the geometries. Does the problem go away if you assign the correct spatial reference?

[KiroAndreev1]

Morten,

I put spatial reference "SpatialReferences.WebMercator" into:

 Esri.ArcGISRuntime.Geometry.PointCollection pcol = new Esri.ArcGISRuntime.Geometry.PointCollection(SpatialReferences.WebMercator);

and solved problem

Thank you!