ArcGIS Pro 2.7 API Reference Guide
GetPoint Method (MultipointBuilderEx)
Example 

ArcGIS.Core.Geometry Namespace > MultipointBuilderEx Class : GetPoint Method
The point index. Must be in the range [0, Coords.Count - 1] inclusive.
A convenience method to get the MapPoint at the specified point index.
Syntax
public MapPoint GetPoint( 
   int pointIndex
)
Public Function GetPoint( _
   ByVal pointIndex As Integer _
) As MapPoint

Parameters

pointIndex
The point index. Must be in the range [0, Coords.Count - 1] inclusive.
Exceptions
ExceptionDescription
The point index is < 0 or the point index is >= Coords.Count.
Example
// Builder constructors need to run on the MCT.
ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
{
  // assume a multiPoint has been built from 4 points
  // the modified multiPoint will have the first point removed and the last point moved

  using (MultipointBuilder mpb = new MultipointBuilder(multipoint))
  {
    // remove the first point
    mpb.RemovePoint(0);

    // modify the coordinates of the last point
    MapPoint pt = mpb.GetMapPoint(mpb.PointCount - 1);
    mpb.RemovePoint(mpb.PointCount - 1);

    MapPoint newPt = MapPointBuilder.CreateMapPoint(pt.X + 1.0, pt.Y + 2.0);
    mpb.Add(newPt);

    Multipoint modifiedMultiPoint = mpb.ToGeometry();
  }
});


// or use the builderEx constructors = don't need to run on the MCT.
MultipointBuilderEx builderEx = new MultipointBuilderEx(multipoint);
// remove the first point
builderEx.RemovePoint(0);
// modify the coordinates of the last point
var ptEx = builderEx.GetPoint(builderEx.PointCount - 1);
builderEx.RemovePoint(builderEx.PointCount - 1);

var newPtEx = MapPointBuilder.CreateMapPoint(ptEx.X + 1.0, ptEx.Y + 2.0);
builderEx.AddPoint(newPtEx);
Multipoint modifiedMultiPointEx = builderEx.ToGeometry() as Multipoint;
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

MultipointBuilderEx Class
MultipointBuilderEx Members