How to get the cell value of selected row in data grid in WPF

  private void dataGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {    
            DataGrid dataGrid = sender as DataGrid;  
            if (e.AddedItems!=null && e.AddedItems.Count>0) 
            {      
                // find row for the first selected item    
                DataGridRow row = (DataGridRow)dataGrid.ItemContainerGenerator.ContainerFromItem(e.AddedItems[0]);    
                if (row != null)  
                {         
                    DataGridCellsPresenter presenter = GetVisualChild(row);  
                    // find grid cell object for the cell with index 0      
                    DataGridCell cell = presenter.ItemContainerGenerator.ContainerFromIndex(0) as DataGridCell;     
                    if (cell != null)    
                    {            
                        Console.WriteLine(((TextBlock)cell.Content).Text);        
                    }    
                }   
            }
        }

static T GetVisualChild(Visual parent) where T : Visual
        {
            T child = default(T);
            int numVisuals = VisualTreeHelper.GetChildrenCount(parent);
            for (int i = 0; i < numVisuals; i++)
            {
                Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
                child = v as T;
                if (child == null)
                    child = GetVisualChild(v);
                if (child != null)
                    break;
            }
            return child;
        }