Converting Generic list to BindingList

// Using global data connection string.
         MultiTestDataContext _DC_MultiTest = new MultiTestDataContext(global::Infrastructure.Properties.Settings.Default.Linq_TestConnectionString);
         using (_DC_MultiTest) // Using allows the Dispose() to execute when it steps out of block code
         {
            IQueryable _IQueryMultiTestA_Details = (from MultiTestADetails in _DC_MultiTest.tbl_MultiTestAs
                                                    select MultiTestADetails).AsQueryable();
            foreach (var _var in _IQueryMultiTestA_Details)
            {
               MessageBox.Show(((Infrastructure.Linq_Database.tbl_MultiTestA)_var).ColA);
            }
            IQueryable<tbl_MultiTestA> _IQueryMultiTestA_Details_ByType = (from MultiTestADetails in _DC_MultiTest.tbl_MultiTestAs
                                                                           select MultiTestADetails).AsQueryable<tbl_MultiTestA>();
            foreach (tbl_MultiTestA _TableRecordDetails in _IQueryMultiTestA_Details_ByType)
            {
               MessageBox.Show(_TableRecordDetails.ColA);
            }
            // Using Global Scope Instance of MultiTestDataContext
            if (DC_MultiTest_GLOBAL.DatabaseExists())
            {
               dgvMultiJoins.DataBindings.Clear(); // Reset the data connection(s)
               dgvMultiJoins.DataSource = (from MultiTestADetails in DC_MultiTest_GLOBAL.tbl_MultiTestAs
                                           select MultiTestADetails);
               // Or
               dgvMultiJoins.DataBindings.Clear(); // Reset the data connection(s)
               dgvMultiJoins.DataSource = (from MultiTestADetails in DC_MultiTest_GLOBAL.tbl_MultiTestAs
                                           select MultiTestADetails).AsQueryable();
            }
         } // using (_DC_MultiTest)