BoldSignEasily embed eSignatures in your .NET applications. Free sandbox with native SDK available.
string oldValue = this.m_gridControl[cc.RowIndex,cc.ColIndex].Text;
GridCurrentCell cc = gridControl1.CurrentCell;
object oldValue = gridControl1[cc.RowIndex, cc.ColIndex].CellValue;
object newValue = cc.Renderer.ControlText;
Console.WriteLine(oldValue + " " + newValue);