public interface ITestTransactionTimer : IDisposable { }

    public class TestTransactionTimer : ITestTransactionTimer
    {
        public TestContext TestContext { get; private set; }
        public string TransactionName { get; private set; }

        public TestTransactionTimer(TestContext testContext, string transactionName)
        {
            this.TestContext = testContext;
            this.TransactionName = transactionName;

            this.TestContext.BeginTimer(this.TransactionName);
        }

        public void Dispose()
        {
            this.TestContext.EndTimer(this.TransactionName);
        }
    }

    public class NoOpTestTransactionTimer : ITestTransactionTimer
    {
        public void Dispose() { }
    }
    protected ITestTransactionTimer LogTransaction(string transactionName)
    {
        if ((null == this.TestContext) || !this.TestContext.Properties.Contains("$LoadTestUserContext"))
        {
            return new NoOpTestTransactionTimer();
        }
        return new TestTransactionTimer(this.TestContext, transactionName);
    }


    private TestContext testContextInstance;
    public TestContext TestContext
    {
        get { return testContextInstance; }
        set { testContextInstance = value; }
    }

    //starting User Session
    [DataSource("Microsoft.VisualStudio.TestTools.DataSource.CSV", "C:\Path\Data.csv", "Data#csv", DataAccessMethod.Sequential), DeploymentItem("C:\Path\Data.csv"), TestMethod]
    public void smokeTest()
    {
        sUserName = "domain\"+TestContext.DataRow["user"].ToString();
        sPassword = TestContext.DataRow["password"].ToString();
        prospectClientId = TestContext.DataRow["prospectClientId"].ToString();
        accountNumber = TestContext.DataRow["accountNumber"].ToString();
        correlationId = "startUserSession - " + obj.ToString();

        // Start User Session
        using (this.LogTransaction("t1_startUserSession"))
        {
            ChannelFactory<IAppShellService> cfsus = null;
            try
            {
                using (ChannelBuilder.mPContext(ref appShellServiceClient, "IAppShellService", sUserName, sPassword, 0, null, correlationId, false, effectiveDate, ref cfsus))
                {
                    var userSessionResult = appShellServiceClient.StartUserSession();
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
            finally
            {
                cfsus.Close();
            }
        }
    }