Better Semaphore fix

Former-commit-id: c679e15305cade71e0fec7d3db7f0eab41224741

src/ImageProcessor.Web/NET45/HttpModules/ImageProcessingModule.cs

@@ -385,16 +385,14 @@ namespace ImageProcessor.Web.HttpModules
                             if (isRemote)
                             {
                                 SemaphoreSlim semaphore = GetSemaphoreSlim(cachedPath);
+#if NET45
+                                await semaphore.WaitAsync();
+#else
+                                semaphore.Wait();
+#endif
                                 try
                                 {
-                                    // This should not happen :(  
-                                    if (semaphore != null)
-                                    {
-                                        semaphore.Wait();
-                                    }
-
                                     Uri uri = new Uri(requestPath + "?" + urlParameters);
-
                                     RemoteFile remoteFile = new RemoteFile(uri, false);
 
                                     // Prevent response blocking.
@@ -433,24 +431,19 @@ namespace ImageProcessor.Web.HttpModules
                                 }
                                 finally
                                 {
-                                    // This should not happen :(  
+                                    semaphore.Release();
-                                    if (semaphore != null)
-                                    {
-                                        semaphore.Release();
-                                    }
                                 }
                             }
                             else
                             {
                                 SemaphoreSlim semaphore = GetSemaphoreSlim(cachedPath);
+#if NET45
+                                await semaphore.WaitAsync();
+#else
+                                semaphore.Wait();
+#endif
                                 try
                                 {
-                                    // This should not happen :(  
-                                    if (semaphore != null)
-                                    {
-                                        semaphore.Wait();
-                                    }
-
                                     // Check to see if the file exists.
                                     // ReSharper disable once AssignNullToNotNullAttribute
                                     FileInfo fileInfo = new FileInfo(requestPath);
@@ -476,11 +469,7 @@ namespace ImageProcessor.Web.HttpModules
                                 }
                                 finally
                                 {
-                                    // This should not happen :(  
+                                    semaphore.Release();
-                                    if (semaphore != null)
-                                    {
-                                        semaphore.Release();
-                                    }
                                 }
                             }
                         }

src/ImageProcessor/Imaging/Formats/GifFormat.cs

@@ -86,7 +86,7 @@ namespace ImageProcessor.Imaging.Formats
                     foreach (GifFrame frame in info.GifFrames)
                     {
                         factory.Image = frame.Image;
-						frame.Image = quantizer.Quantize(processor.Invoke(factory));
+                        frame.Image = quantizer.Quantize(processor.Invoke(factory));
                         encoder.AddFrame(frame);
                     }
                 }

src/TestWebsites/NET45/Test_Website_NET45/Web.config

@@ -6,17 +6,17 @@
 
 <configuration>
   <configSections>
-    <!--<sectionGroup name="imageProcessor">
+    <sectionGroup name="imageProcessor">
       <section name="security" requirePermission="false" type="ImageProcessor.Web.Configuration.ImageSecuritySection, ImageProcessor.Web"/>
       <section name="processing" requirePermission="false" type="ImageProcessor.Web.Configuration.ImageProcessingSection, ImageProcessor.Web"/>
       <section name="cache" requirePermission="false" type="ImageProcessor.Web.Configuration.ImageCacheSection, ImageProcessor.Web"/>
-    </sectionGroup>-->
+    </sectionGroup>
   </configSections>
-  <!--<imageProcessor >
+  <imageProcessor >
     <security configSource="config\imageprocessor\security.config"/>
     <cache configSource="config\imageprocessor\cache.config"/>
     <processing configSource="config\imageprocessor\processing.config"/>
-  </imageProcessor>-->
+  </imageProcessor>
   <appSettings>
     <add key="webpages:Version" value="2.0.0.0" />
     <add key="webpages:Enabled" value="false" />