How to use Join with LINQ

using System;

using System.Linq;

using System.Configuration;

public partial class LINQWithJoin : System.Web.UI.Page

{

    TestDataClassesDataContext objDBContext = new TestDataClassesDataContext(ConfigurationManager.ConnectionStrings["TestConnectionString"].ToString());

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    protected void btnDisplay_Click(object sender, EventArgs e)

    {

        var Allcity = from city in objDBContext.City_Tbls join state in objDBContext.State_Tbls on city.State_Id equals state.State_Id

                            select new

                            {

                               CityName=city.Name,

                               StateName=state.Name

                            };

        GridView1.DataSource = Allcity;

        GridView1.DataBind();

   

    }

}

int above code CityName & StateName works as a alias from city.Name and state.Name

such as in SqlQuery.