How to add two button in datagridview combox cell using C#

Please any one help me, how to insert two button in one column of data grid view button column in data grid view using c# windows application.

I want add two button like Change Rep and Undo button in one column of datagridview.

ChangeRep = new DataGridViewButtonColumn(); // ChangeRep.UseColumnTextForButtonValue = true; ChangeRep.HeaderText = ""; ChangeRep.Width = 120; ChangeRep.Name = "ChangeRep"; ChangeRep.Text = "Change Rep"; ChangeRep.HeaderText = "ChangeRep"; ChangeRep.FlatStyle = FlatStyle.Popup; ChangeRep.DefaultCellStyle.BackColor = System.Drawing.Color.Navy; ChangeRep.DefaultCellStyle.ForeColor = System.Drawing.Color.White; ChangeRep.UseColumnTextForButtonValue = true; //gv_CRWS_details.Columns.Insert(23, ChangeRep);             undo = new DataGridViewButtonColumn(); // ChangeRep.UseColumnTextForButtonValue = true;             undo.HeaderText = "";             undo.Width = 120;             undo.Name = "undo";             undo.Text = "Undo";             undo.HeaderText = "ChangeRep";             undo.FlatStyle = FlatStyle.Popup;             undo.DefaultCellStyle.BackColor = System.Drawing.Color.Navy;             undo.DefaultCellStyle.ForeColor = System.Drawing.Color.White;             undo.UseColumnTextForButtonValue = true;             gv_CRWS_details.Columns.Insert(23,ChangeRep);