Arcengine,C#,获得线的长度中点

public static IPoint getLineCenterPoint(IPolyline pPolyline)

{

    double d = pPolyline.Length;

    IPoint pPoint = new PointClass();

    pPolyline.QueryPoint(esriSegmentExtension.esriNoExtension, d / 2, false, pPoint);

    return pPoint;

 

}