Return datatable from Webservice

Hai,
[WebMethod]
public DataTable TestDatatable
{
DataTable dt = new DataTable("AddressDatatable");
dt.Columns.Add("Name",typeof(System.String));
dt.Columns.Add("Address", typeof(System.String));

DataRow dr = dt.NewRow();
dr["Name"] = "Jinesh";
dr["Address"] = "RevathiBhavan";
dt.Rows.Add(dr);
dr = dt.NewRow();
dr["Name"] = "Retheesh";
dr["Address"] = "RetheeshBhavan";
dt.Rows.Add(dr);
return dt;
}
Client code:
private void button1_Click(object sender, EventArgs e)
{
helloservice.Service1 service = new WindowsFormsApplication1.helloservice.Service1();
DataTable dt = service.TestDatatable();
}
Note: If you don't give datatable name while declaring it may not not work properly.