public class ElevationProfileResult 

// find the elevation profile for a polyline / set of polylines
var result = await MapView.Active.Map.GetElevationProfileFromSurfaceAsync([lineGeom]);
if (result.Status == SurfaceZsResultStatus.Ok)
{
  var polylineZ = result.Polyline;

  // process the polylineZ
}

// find the elevation profile for a set of points
result = await MapView.Active.Map.GetElevationProfileFromSurfaceAsync(pts);
if (result.Status == SurfaceZsResultStatus.Ok)
{
  var polylineZ = result.Polyline;

  // process the polylineZ
}

// find the elevation profile for a polyline / set of polylines
var eleLayer = MapView.Active.Map.GetElevationSurfaceLayers().FirstOrDefault(l => l.Name == "TIN");
var zResult = await MapView.Active.Map.GetElevationProfileFromSurfaceAsync([lineGeom], eleLayer);
if (zResult.Status == SurfaceZsResultStatus.Ok)
{
  var polylineZ = zResult.Polyline;

  // process the polylineZ
}

// find the elevation profile for a set of points
zResult = await MapView.Active.Map.GetElevationProfileFromSurfaceAsync(pts, eleLayer);
if (zResult.Status == SurfaceZsResultStatus.Ok)
{
  var polylineZ = zResult.Polyline;

  // process the polylineZ
}

int numPoints = 20;

// use the default ground elevation surface
var result = await MapView.Active.Map.GetElevationProfileFromSurfaceAsync(startPt, endPt, numPoints);
if (result.Status == SurfaceZsResultStatus.Ok)
{
  var polylineZ = result.Polyline;

  // process the polylineZ
}

// use a specific elevation surface
var eleLayer = MapView.Active.Map.GetElevationSurfaceLayers().FirstOrDefault(l => l.Name == "TIN");
result = await MapView.Active.Map.GetElevationProfileFromSurfaceAsync(startPt, endPt, numPoints, eleLayer);
if (result.Status == SurfaceZsResultStatus.Ok)
{
  var polylineZ = result.Polyline;

  // process the polylineZ
}