DicomSharp open source project is intented to provide an OO class library for DICOM communication and will be developed purely by C# and running in .NET environment. DicomSharp partially rewrites DICOM# open source project to .Net 3.5, however you can fork it and make it the latest version if you want.
If this is too grandeous for your tastes then check out DICOM# which this library is built upon.
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA