Well, at the moment you can use
ProjectionInfo.FromProj4String() or ProjectionInfo.FromEsriString() to create any projection without having it in KnownCoordinateSystems. Also you can edit properties of ProjectionInfo to tune projection to your needs.
It will be great if you will provide a patch for NAD83(Hawaii) so we can include it into DotSpatial.
ProjectionInfo.FromProj4String() or ProjectionInfo.FromEsriString() to create any projection without having it in KnownCoordinateSystems. Also you can edit properties of ProjectionInfo to tune projection to your needs.
It will be great if you will provide a patch for NAD83(Hawaii) so we can include it into DotSpatial.