BitmapImage B = new BitmapImage();
B.BeginInit();
B.StreamSource = asm.GetManifestResourceStream("WpfApplication26.Back1.png");
B.EndInit();
image1.Source = B;
The size of the image (Back1.png) is 32*32, and I set the size of my image control to 32*32 and set the property "Scale" to "None".