The Google Maps .NET Control for ASP.NET 4.
The control targets version 3 of Google's Map API
Features included in the control are: Overlays, layers, controls, KML read/write support geocoding/routing (in areas supported by Google's geocoding service).
Google Static Maps API is also supported.
If you want to run it under .NET 2.0, please download the source code and compile it as .NET 2.0.
File is available as Nuget package.