Update image.md

Author: dessyordanova

libraries/radpdfprocessing/model/image.md

@@ -37,21 +37,23 @@ __Example 1__ shows how to initialize an Image object, assigns an ImageSource to
 #### __[C#] Example 1: Create image__
 
 {{region cs-radpdfprocessing-model-image_0}}
-	RadFixedDocument fixedDocument = new RadFixedDocument();
+    RadFixedDocument fixedDocument = new RadFixedDocument();
     RadFixedPage fixedPage = fixedDocument.Pages.AddPage();
 
     Image image = new Image();
     string imageFilePath = "ProgressNinjas.png";
-    FileStream fileStream = new FileStream(imageFilePath, FileMode.Open);
-    ImageSource imageSrc = new ImageSource(fileStream);
-    image.ImageSource = imageSrc;
-    image.Width = 200;
-    image.Height = 200;
-    image.AlphaConstant = 0.5; 
-    SimplePosition simplePosition = new SimplePosition();
-    simplePosition.Translate(200, 300);
-    image.Position = simplePosition;
-    fixedPage.Content.Add(image);
+    using (FileStream fileStream = new FileStream(imageFilePath, FileMode.Open))
+    {
+        ImageSource imageSrc = new ImageSource(fileStream);
+        image.ImageSource = imageSrc;
+        image.Width = 200;
+        image.Height = 200;
+        image.AlphaConstant = 0.5;
+        SimplePosition simplePosition = new SimplePosition();
+        simplePosition.Translate(200, 300);
+        image.Position = simplePosition;
+        fixedPage.Content.Add(image);
+    }
 {{endregion}}
 
 Once the above RadFixedDocument is [exported]({%slug radpdfprocessing-formats-and-conversion-pdf-pdfformatprovider%}), the following document with an image is created: