A .NET (C#, VB etc) SDK for developing multimedia SIP applications and services.
BS Editor: Unity SIP .NET SDK provides a high-level fully managed code platform that empowers developers to Create instant messaging, telephony, Multimedia conferencing, and presence enabled applications and services.

Unity SIP .NET SDK contains a Session Initiation Protocol (SIP) and Session Description Protocol (SDP) API written for the .NET platform of your choice. It is designed to run on either Mono or the Microsoft .NET CLR and supports Microsoft .NET Framework and Microsoft .NET Compact Framework. Managers and developers appreciate the ability to easily create great SIP-based applications that run anywhere.

The package is intended to create multimedia and conferencing applications. The API takes care of the low-level SIP Details and exposes service-level features to enable easy communication and collaboration development. So whether you are working on an instant messaging or VoIP solution, adding mobility support to an existing solution, or just connecting to your customers wherever and whenever, then Unify SIP .NET SDK will help you get quickly up and running with SIP, simply and with minimum effort.

The class libraries supports sending and receiving of information, options, registration and session management SIP messages.

The SDK contains an RFC-based implementation of the SIP and SDP standards as a .NET API written against the .NET platform. The client is fully compatible with IMS, Microsoft Communication Server 2007 and others. you can free download Unify SIP .NET SDK 3.0 now.