Are server side cursors supported in .NET

No. Nicholas Paldino gives the following response in a position to the microsoft.public.dotnet.framework.odbcnet newsgroup.
There are no updateable cursors ANYWHERE in .NET for that matter. The way .NET handles data is you push it into a dataset. The dataset keeps track of the changes that are made, and then you pass the data set back to a data adapter, which will fire off the appropriate insert, update, and delete statements in order to update the underlying data source. All of the data access in .NET is based on a disconnected data model.