ArcGIS Pro 2.7 API Reference Guide
RemoveGeometry Method
Example 

ArcGIS.Core.Geometry Namespace > GeometryBagBuilder Class : RemoveGeometry Method
0 based index. Specify 0 to remove the first geometry. Specify (Count - 1) or -1 to remove the last geometry.
Remove the geometry specified by the given index.
Syntax
public void RemoveGeometry( 
   int index
)
Public Sub RemoveGeometry( _
   ByVal index As Integer _
) 

Parameters

index
0 based index. Specify 0 to remove the first geometry. Specify (Count - 1) or -1 to remove the last geometry.
Exceptions
ExceptionDescription
This method or property must be called within the lambda passed to QueuedTask.Run.
index must be less than the number of geometries in the builder or equal to -1.
Example
// Builder constructors need to run on the MCT.
ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
{
  using (GeometryBagBuilder builder = new GeometryBagBuilder(SpatialReferences.WGS84))
  {
    GeometryBag emptyBag = builder.ToGeometry();
    // emptyBag.IsEmpty = true

    MapPoint point = MapPointBuilder.CreateMapPoint(1, 2, SpatialReferences.WebMercator);
    builder.AddGeometry(point);
    // builder.CountGeometries = 1

    GeometryBag geometryBag = builder.ToGeometry();
    // geometryBag.PartCount = 1
    // geometryBag.PointCount = 1
    // geometryBag.IsEmpty = false

    IReadOnlyList<Geometry> geometries = geometryBag.Geometries;
    // geometries.Count = 1
    // geometries[0] is MapPoint with a sr of WGS84

    bool isEqual = geometryBag.IsEqual(emptyBag);   // isEqual = false

    List<Coordinate2D> coords2D = new List<Coordinate2D>()
    {
    new Coordinate2D(0, 0),
    new Coordinate2D(0, 1),
    new Coordinate2D(1, 1),
    new Coordinate2D(1, 0)
    };

    Multipoint multipoint = MultipointBuilder.CreateMultipoint(coords2D, SpatialReferences.WGS84);
    builder.InsertGeometry(0, multipoint);
    geometryBag = builder.ToGeometry();
    // geometryBag.PartCount = 2

    geometries = geometryBag.Geometries;
    // geometries.Count = 2
    // geometries[0] is Multipoint
    // geometries[1] is MapPoint

    Polyline polyline = PolylineBuilder.CreatePolyline(coords2D, SpatialReferences.WebMercator);
    builder.AddGeometry(polyline);
    builder.RemoveGeometry(1);
    geometryBag = builder.ToGeometry();
    // geometryBag.PartCount = 2

    geometries = geometryBag.Geometries;
    // geometries.Count = 2
    // geometries[0] is Multipoint
    // geometries[1] is Polyline          
  }
});
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

GeometryBagBuilder Class
GeometryBagBuilder Members