system.drawing

ImageList should create a copy of all images that are inserted into it. Therefore it should be safe to dispose the originals after adding them to the list. Why does the following testcase fail? Bitmap test = new Bitmap(128, 128); ImageList il = new ImageList(); il.Images.Add(test); Assert.AreEqual(1, il.Images.Count); // OK, image has been inserted test.Dispose(); // now let's dispose the original try { var retrievalTest = il.Images[0]; } catch (ArgumentException) // ... but this Exception happens! { } Assert.AreEqual(1, il.Images.Count); // and this will fail What seems to happen here is this

I am making a image editor kinda for own enjoyment and was wondering how could I make a undo button to undo the last paints I did? I want to know how I would about this, a tutorial or sample code would be nice or at least something pointing me in the right direction. Thanks! heh undo in really non that hard as it sounds. The magic here that you should record each action as object which is painted in a list or queue, f.ex, user draws a line, so your record could look like x,y of start poing, and x,y of end point or object it self which have method Draw(), so what undo will do just remove that

I am trying for some time now to add System.Drawing to the references in Visual Studio 2015. Nothing seems to work. When I go into the add reference pane, there is no System.Drawing in the list. I need the Bitmap class from System.Drawing not one from Android.Graphics As @Cheesebaron quoted once if forum : If you look at http://docs.xamarin.com/guides/android/advanced_topics/assemblies you will see that System.Drawing is not a part of the Assemblies shipped with Xamarin.Android, the same goes for Xamarin.iOS. You will need to use the Android counterparts to filter images. The alternative

I'm using .NET to draw a diagram, and I want to highlight objects when the user performs a click on them. It is easy when a figure is fully contained in a rectangle: if (figure.Bounds.Contains(p)) // bounds is a rectangle But I don't know how to manage it if the figure is a complex GraphicsPath . I have defined the following GraphicsPath for the figure (the green circle). I want to highlight the figure when the user click on it. I would like to know if a Point is contained in that GraphicsPath . Any ideas? Thanks in advance. I don't know a DrawingPath (you mean probably; graphics.DrawPath) but

Using some pretty stock standard C# code to resize an image, and place it on a coloured background Image imgToResize = Image.FromFile(@"Dejeuner.jpg"); Size size = new Size(768, 1024); Bitmap b = new Bitmap(size.Width, size.Height); Graphics g = Graphics.FromImage((Image)b); g.InterpolationMode = InterpolationMode.HighQualityBicubic; g.FillRectangle(Brushes.Green, 0, 0, size.Width, size.Height); g.DrawImage(imgToResize, new Rectangle(0,150,768, 570)); b.Save("sized_HighQualityBicubic.jpg"); The result has a funny artefact in the 0th and 1st columns of pixels. The 0th column appears to be mixed