private void inkCanvas_ManipulationStarting(object sender, ManipulationStartingEventArgs e)

        {

            e.ManipulationContainer = canvas;

            e.Mode = ManipulationModes.All;

            inkCanvas.EditingMode = InkCanvasEditingMode.None;

        }



        private void inkCanvas_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)

        {

            FrameworkElement element = (FrameworkElement)e.Source;

            element.Opacity = 0.9;



            try

            {

                Matrix matrix = ((MatrixTransform)element.RenderTransform).Matrix;



                var deltaManipulation = e.DeltaManipulation;



                Point center = new Point(element.Margin.Left, element.Margin.Top);

                center = matrix.Transform(center);



                matrix.ScaleAt(deltaManipulation.Scale.X, deltaManipulation.Scale.Y, center.X, center.Y);                

                               



                //matrix.RotateAt(e.DeltaManipulation.Rotation, center.X, center.Y);



                if (this.canvas.Margin.Left > 0 && this.canvas.Margin.Top > 0) { }



                if (this.Margin.Left > 0&&this.Margin.Top<0)

                {

                    matrix.Translate(0, deltaManipulation.Translation.Y);

                }

                else if (this.Margin.Left < 0 && this.Margin.Top > 0)

                {

                    matrix.Translate(deltaManipulation.Translation.X, 0);

                }

                else if (this.Margin.Left > 0 && this.Margin.Top > 0)

                {

                    matrix.Translate(0, 0);

                    this.Margin = new Thickness(0, 0, this.Margin.Right, this.Margin.Bottom);

                }

                else 

                {

                    matrix.Translate(deltaManipulation.Translation.X, deltaManipulation.Translation.Y);

                }

            

                

                ((MatrixTransform)element.RenderTransform).Matrix = matrix;

            }

            catch { throw new Exception(); }

        }



        private void inkCanvas_ManipulationCompleted(object sender, ManipulationCompletedEventArgs e)

        {

            FrameworkElement element = (FrameworkElement)e.Source;

            element.Opacity = 1;



            if (this.canvas.Margin.Left > 0 && this.canvas.Margin.Top > 0) { }

            Point point=inkCanvas.TransformToVisual(canvas).Transform(new Point());

            //MessageBox.Show(point.X + "," + point.Y+"|"+element.Margin.Top+","+element.Margin.Left);



            if (point.X > 0)

            {

                System.Windows.Controls.Canvas.SetLeft(inkCanvas, 0);

                //inkCanvas.Margin = new Thickness(0, inkCanvas.Margin.Top, inkCanvas.Margin.Right, inkCanvas.Margin.Bottom);

            }

            if (point.Y > 0) 

            {

                System.Windows.Controls.Canvas.SetTop(inkCanvas, 0);

                //inkCanvas.Margin = new Thickness(inkCanvas.Margin.Left, 0, inkCanvas.Margin.Right, inkCanvas.Margin.Bottom);

            }

        }