ArcGIS Pro 3.3 API Reference Guide
ArcGIS.Core.Geometry Namespace / MultipartBuilderEx Class / RemovePart Method
The index of the part to remove. Must be less than PartCount. Specify -1 or (PartCount - 1) to remove the last part.
Example

In This Topic
    RemovePart Method
    In This Topic
    Remove the part specified by partIndex.
    Syntax
    public void RemovePart( 
       int partIndex
    )
    Public Sub RemovePart( _
       ByVal partIndex As Integer _
    ) 

    Parameters

    partIndex
    The index of the part to remove. Must be less than PartCount. Specify -1 or (PartCount - 1) to remove the last part.
    Exceptions
    ExceptionDescription
    partIndex is greater than PartCount - 1.
    Example
    Build a multi-part Polyline
    List<MapPoint> firstPoints = new List<MapPoint>();
    firstPoints.Add(MapPointBuilderEx.CreateMapPoint(1.0, 1.0));
    firstPoints.Add(MapPointBuilderEx.CreateMapPoint(1.0, 2.0));
    firstPoints.Add(MapPointBuilderEx.CreateMapPoint(2.0, 2.0));
    firstPoints.Add(MapPointBuilderEx.CreateMapPoint(2.0, 1.0));
    
    List<MapPoint> nextPoints = new List<MapPoint>();
    nextPoints.Add(MapPointBuilderEx.CreateMapPoint(11.0, 1.0));
    nextPoints.Add(MapPointBuilderEx.CreateMapPoint(11.0, 2.0));
    nextPoints.Add(MapPointBuilderEx.CreateMapPoint(12.0, 2.0));
    nextPoints.Add(MapPointBuilderEx.CreateMapPoint(12.0, 1.0));
    
    // use AttributeFlags.None since we have 2D points in the list
    PolylineBuilderEx pBuilder = new PolylineBuilderEx(firstPoints, AttributeFlags.None);
    pBuilder.AddPart(nextPoints);
    
    Polyline polyline = pBuilder.ToGeometry();
    // polyline has 2 parts
    
    pBuilder.RemovePart(0);
    polyline = pBuilder.ToGeometry();
    // polyline has 1 part
    
    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3 or higher.
    See Also