refactor creating file stream in drawSkiaGrid function.

DeathSocket/ImageServices.fs

@@ -72,13 +72,8 @@
         imageFill.Style <- SKPaintStyle.Fill
 
         // Add Bitmap
-        //let fileStream = File.Open (@"C:\Users\craig\Desktop\test.jpg", FileMode.Open)
-
-        let byteArray = File.ReadAllBytes(@"C:\Users\craig\Desktop\test.jpg")
-        use memStream = new MemoryStream(byteArray)
-
-        // this works...
-        use skStream = new SKManagedStream (memStream)
+        let fileStream = File.Open (@"C:\Users\craig\Desktop\test.jpg", FileMode.Open)
+        use skStream = new SKManagedStream (fileStream)
         use bitmap = SKBitmap.Decode (skStream)
         use shader = SKShader.CreateBitmap (bitmap, SKShaderTileMode.Mirror, SKShaderTileMode.Mirror)
         imageFill.Shader <- shader