multithreading - How to populate two dataGridViews continously using different threads in C#? -

i have created 2 datagridviews , start button shown in figrue.

when press start button 2 threads t1 , t2 created using delegate mydel.

actually, want both datagridview1 , datagridview2 populated continuously. datagridview2 getting updated continuously. after completion of datagridview2, datagridview1 starts updating.

can please give me suggestion how fix this?

using system; using system.windows.forms; using system.threading;  namespace multithreadeddatagridviewdemo {     public partial class form1 : form     {         private delegate void mydel();          int count=0;         int count_1 = 0;          public form1()         {                 initializecomponent();              //cells created in datagridview1 , datagridview2             (int p = 0; p < 37; p++)             {                  datagridview1.columns.add("", "");// dynamic cloumn adding                  datagridview1.rows.add();//dynamic row adding                  datagridview1.columns[p].sortmode = datagridviewcolumnsortmode.notsortable;//disables column header sorting                  datagridview1.columns[p].autosizemode = datagridviewautosizecolumnmode.none;                  datagridview1.columns[p].width = 70;                   datagridview2.columns.add("", "");// dynamic cloumn adding                  datagridview2.rows.add();//dynamic row adding                  datagridview2.columns[p].sortmode = datagridviewcolumnsortmode.notsortable;//disables column header sorting                  datagridview2.columns[p].autosizemode = datagridviewautosizecolumnmode.none;                  datagridview2.columns[p].width = 70;              }         }         //method populate datagridview1         public void method1()         {             while (count < 10000)             {                 (int = 0; < datagridview1.rows.count; i++)                 {                     (int k = 0; k < datagridview1.columns.count; k++)                     {                          datagridview1.rows[i].cells[k].value = count;                     }                 }                 count++;             }         }         //method populate datagridview2                    public void method2()         {             while (count_1 < 10000)             {                 (int = 0; < datagridview2.rows.count; i++)                 {                     (int k = 0; k < datagridview2.columns.count; k++)                     {                         datagridview2.rows[i].cells[k].value = count_1;                     }                 }                 count_1++;             }                           }          //creates threads populate datagridview1 , datagridview1         private void btn_start_click(object sender, eventargs e)         {                 mydel del_1 = new mydel(method1);                 thread t1 = new thread(new threadstart(del_1));                 t1.start();                  mydel del_2 = new mydel(method2);                 thread t2 = new thread(new threadstart(del_2));                 t2.start();         }     } } 

you should use backgroundworker, , update ui in it's progresschanged-event, used access ui-thread. reportprogress-method can send int percentprogress , object userstate linked progresschanged-method. userstate-object can, example, pass list full of datagridviewrows , add them in progresschanged-method datagridview.