In this post Product Engineer Derek Weatherbe discusses support for curves added to the .NET Web ADF at 9.3
At 9.2, using Identify or executing a task against a feature that had a curved segment would not work. Prior to Service Pack 3, this action would return an ‘object reference’ error. At SP 3, we started capturing this error to return the more descriptive ‘Curves are not supported’ exception.
At 9.3 we enhanced ArcGIS Server map services to return densified geometry when requested. We now leverage this in the ADF so that Identify and other tasks can return results for features that contain curves and highlight them. The SOM, SOC and Web ADF must be at version 9.3 for this to work.