arcobjects - Split a Polyline into small segments

I am writing an addin, which needs to split a polyline into a number of segments taking the number of segments as an input from user. How can I accomplish this?

Answer

Use IGeometryBridge2.SplitAtDistances(). Also see the documentation on the equivalent IPolycurve2.SplitAtDistances() and the singular IPolycurve.SplitAtDistance() methods for more explanation.

The IGeometryBridge2 version must be used in .NET.

Edit: This code works for me:

private static IEnumerable SplitPolylineIntoEqualSegments(IPolyline polyline, int numSegments)
{
    var geombridge = (IGeometryBridge2)new GeometryEnvironmentClass();
    var paths = (IGeometryCollection)polyline;
    for (int i = 0; i < paths.GeometryCount; i++)
    {
        var path = (IPath)paths.get_Geometry(i);
        var distances = new double[Math.Max(1, numSegments - 1)];

        for (int j = 0; j < distances.Length; j++)
        {
            distances[j] = (j + 1.0) / numSegments;
        }
        var polyline2 = PathToPolyline(path);
        geombridge.SplitAtDistances((IPolycurve2)polyline2, ref distances, true, true);
        var splitpaths = (IGeometryCollection)polyline2;
        for (int k = 0; k < splitpaths.GeometryCount; k++)
        {
            var splitpath = (IPath)splitpaths.get_Geometry(k);

            yield return PathToPolyline(splitpath);
        }
    }
}

private static IPolyline PathToPolyline(IPath path)
{
    var polyline = (IPolyline)new PolylineClass();
    var geomcoll = (IGeometryCollection)polyline;
    geomcoll.AddGeometry(path);

    geomcoll.GeometriesChanged();
    return polyline;
}