Added a clear method to map & call it in dispose pageresources

Author: synercoder

src/Synercoding.FileFormats.Pdf/Internals/Map.cs

@@ -25,6 +25,12 @@ public void Add(T1 t1, T2 t2)
             _reverse.Add(t2, t1);
         }
 
+        public void Clear()
+        {
+            _forward.Clear();
+            _reverse.Clear();
+        }
+
         public IEnumerator<KeyValuePair<T1, T2>> GetEnumerator()
         {
             return _forward.GetEnumerator();

src/Synercoding.FileFormats.Pdf/LowLevel/PageResources.cs

@@ -17,6 +17,8 @@ public void Dispose()
         {
             foreach (var kv in _images)
                 kv.Value.Dispose();
+
+            _images.Clear();
         }
 
         public PdfName AddImageToResources(Image image)

src/Synercoding.FileFormats.Pdf/PackageDetails.props

@@ -10,7 +10,7 @@
     <Product>Synercoding.FileFormats.Pdf</Product>
     <Title>Synercoding.FileFormats.Pdf</Title>
     <Description>Contains classes which makes it easy to quickly create a pdf file.</Description>
-    <PackageReleaseNotes>Added support for the drawing of shapes.</PackageReleaseNotes>
+    <PackageReleaseNotes>Fixed a memory buildup bug by clearing the dictionary that contained the image references on dispose.</PackageReleaseNotes>
   </PropertyGroup>
 
 </Project>