How to create a multipoint object from the vertices of a polyline

Creating a multipoint object from the vertices of a polyline

The following code example creates a multipoint with point elements being copies of the vertices of an existing polyline. It then offsets those elements five units to the right using one transformation method, then offsets them up another five units.
[C#] 
private void TransformPoint(IPolyline polyline)
{
    IPointCollection polylinePoints = polyline as IPointCollection;
    IGeometry multipoint = new MultipointClass();
    multipoint.SpatialReference = polyline.SpatialReference;

    IPointCollection multipointPoints = multipoint as IPointCollection;

    //Add copies of the polyline vertices to the multipoint.
    multipointPoints.AddPointCollection(polylinePoints);

    IAffineTransformation2D affineTransformation = new AffineTransformation2DClass();
    affineTransformation.Move(5, 0);

    ITransform2D transformee = multipoint as ITransform2D;
    transformee.Transform(esriTransformDirection.esriTransformForward,
        affineTransformation);

    //Shift up by 5. 
    transformee.Move(0, 5);
    transformee.Transform(esriTransformDirection.esriTransformForward,
        affineTransformation);
}
[VB.NET] 
Private Sub TransformPoint(ByVal polyline As IPolyline)
    Dim polylinePoints As IPointCollection = CType(polyline, IPointCollection)
    Dim multipoint As IGeometry = New MultipointClass()
    multipoint.SpatialReference = polyline.SpatialReference
    
    Dim multipointPoints As IPointCollection = CType(multipoint, IPointCollection)
    
    'Add copies of the polyline vertices to the multipoint.
    multipointPoints.AddPointCollection(polylinePoints)
    
    Dim affineTransformation As IAffineTransformation2D = New AffineTransformation2DClass()
    affineTransformation.Move(5, 0)
    
    Dim transformee As ITransform2D = CType(multipoint, ITransform2D)
    transformee.Transform(esriTransformDirection.esriTransformForward, affineTransformation)
    
    'Shift up by 5.
    transformee.Move(0, 5)
    transformee.Transform(esriTransformDirection.esriTransformForward, affineTransformation)
End Sub





To use the code in this topic, reference the following assemblies in your Visual Studio project. In the code files, you will need using (C#) or Imports (VB .NET) directives for the corresponding namespaces (given in parenthesis below if different from the assembly name):
Development licensing Deployment licensing
ArcGIS for Desktop Basic ArcGIS for Desktop Basic
ArcGIS for Desktop Standard ArcGIS for Desktop Standard
ArcGIS for Desktop Advanced ArcGIS for Desktop Advanced
Engine Developer Kit Engine