New Post: Label for a curved line

OK, finally i found the solution, which is a bit confusing to me ;-)

The problem was that we created our LineString features from code like this:

featureSet.AddFeature(new Feature(FeatureType.Line, coordinates));

instead of:

featureSet.AddFeature(new LineString(coordinates));

One would expect the result to be the same but it is not, now in the MapLabelLayer.PlaceLineLabel() method the first statement uses:

Geometry.FromBasicGeometry(lineString)

which unexpectedly converts it into a MultiLineString geometry and there it stops because this cannot be cast to ILineString

I suppose we could adapt the labeling code to work for MultiLineString features as well, but i would say there is a more fundamental issue here in the way the Geometry.FromBasicGeometry() method converts the LineString back to a MultiLineString unexpectedly ?

I am not sure how i could fix that, and i am running out of time in the project i am working on.

Kudos to you Jany, even for a linestring which twists and bends along a river the labeling works well enough for us now !