So what happen is, I had my XML documentation file checkbox in build tab of project was checked. And I had few service references in my project.
As you can guess all of the service ref has around more than 2000 methods, since this checkbox was checked all the public methods of service proxy class was giving a warning about summery of the function.
It was frustrating to see that amount of warning in my project, Then unchecked the checkbox and wallah all the warning are gone.
Inner peace is on,,,,