1] using NuGet a excellent package management system for the Dotnet install DotnetOpenAuth or download it from SourceForge DotnetOpenAuth Latest version.
3] you need to use given twitterConsumerKeys and TwitterConsumerSecret keys to request authorisation to your app. Add these keys into Web.config as a appSettings
4] Add below code on Controller Action or on Page Load.
5] add TokenManager
now run your code and You will be asked for permission to connect to your twitter account.