WPF Datagrid - Edit on focus

DataGridAutomaticEditingBehavior.cs

namespace {Your.Namespace.Here}.Behaviors {
	using System.Windows.Controls;
	using System.Windows.Interactivity;
	// Pulled from: http://codermonkey65.blogspot.com/2012/12/making-wpf-datagrid-keyboard-friendly.html
	public class DataGridAutomaticEditingBehavior : Behavior<DataGrid> {
		protected override void OnAttached() {
			AssociatedObject.GotFocus += AssociatedObject_GotFocus;
			base.OnAttached();
		}

		void AssociatedObject_GotFocus(object sender, System.Windows.RoutedEventArgs e) {
			DataGridCell gridCell = e.OriginalSource as DataGridCell;
			if (gridCell != null) {
				gridCell.EnterEdit(AssociatedObject);
			}
		}
	}
	public static class GridCellExtensions{
		public static void EnterEdit(this DataGridCell gridCell, DataGrid grid, bool bFocus = true) {
			if (gridCell != null && !gridCell.IsEditing) {
				// enables editing on single click  
				if (!gridCell.IsFocused)
					gridCell.Focus();
				if (!gridCell.IsSelected && grid.SelectionUnit == DataGridSelectionUnit.Cell)
					gridCell.IsSelected = true;
				grid.BeginEdit();
				if (bFocus) {
					gridCell.Focus();
				}
			}
		}
	}
}