Best way to bind gridview

This is the optimized code to bind a gridview in asp.net in C#. As all know it is most favorite question in interview so answer it with optimization



private static void Fn_GridBInd()
        {
            try
            {
                using (var odt = new DataTable())
                {
                    using (var ocon = new SqlConnection("Data Source=121.0.0.1; Initial catalog=master; User ID=sa; pwd=admin"))
                    {
                        using (var od = new SqlDataAdapter("select * from sys.tables", ocon))
                        {
                            od.Fill(odt);
                        }
                    }
                    if (odt.Rows.Count > 0)
                    {
                        //Bind the gridview with smile :)
                    }
                }
            }
            catch (Exception ex)
            {
                //Handle the exception.... :(
            }
        }


After this answer u will arise many good questions to used in answer like
Use of var ( http://msdn.microsoft.com/en-us/library/bb383973.aspx )
Use of using block ( http://msdn.microsoft.com/en-us/library/yh598w02(v=vs.80).aspx )
Using sqldataadpater class
Exception handling ( there are many ways u can use log4net )
and many more