How to use Rational Team Concert Client for Microsoft Visual Studio IDE dlls

I want to connect RTC (url) using Rational Team Concert Client for Microsoft Visual Studio IDE dlls. I have implemented the following codes:

TeamRepositoryConnectionInfo tc = new TeamRepositoryConnectionInfo();
tc.RepositoryURI = "https://test:9443/ccm/";
tc.UserName = "ak";
tc.Password = "ak";

com.ibm.team.repository.common.wrapper.RepositoryWrapper("https://test:9443/ccm/");

ITeamRepository teamRepository = null;
teamRepository = TeamPlatform.GetTeamRepositoryClient().GetTeamRepository("https://test:9443/ccm/");

if (teamRepository != null)
{
       com.ibm.team.repository.client.TeamPlatform.GetTeamRepositoryClient().RemoveTeamRepository(teamRepository);
}
com.ibm.team.repository.client.TeamPlatform.GetTeamRepositoryClient().CreateNewRepositoryConnection(tc);
              
teamRepository = TeamPlatform.GetTeamRepositoryClient().GetTeamRepository("https://test:9443/ccm/");

teamRepository.Login(null);

upto this Login call everything is working fine for a valid userid and password.

Now I want to get the values of com.ibm.team.workitem.client.IWorkItemClient using teamRepository object as defined earlier as found in the eclipse RTC plugin example
IWorkItemClient workItemClient = (IWorkItemClient) teamRepository.getClientLibrary();

But not getting any method to do so.

Please help me to proceed for the same.

Thanks in Advance