MS CRM 2016 Connection Issues from Console Application .

Dear all,

I am getting Object Null reference Exception ,When i tried to login into CRM online Using Console Application

C#:-

CrmServiceClient conn = new Xrm.Tooling.Connector.CrmServiceClient(connectionString);

in Web.config File

<add name="Server=CRM Online, organization=orgbfafba6b, user=sairam@sairamsoft.onmicrosoft.com"
connectionString="Url=sairamsoft.crm8.dynamics.com; Username=sairam@sairamsoft.onmicrosoft.com; Password=myrealpassword;"/>

I don't Know why I am getting this Error.Unable to resolve.