Fixed: Memory leak due to unmanaged Bitmaps leaking.

src/.idea/.idea.NzbDrone/.idea/encodings.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding" addBOMForNewFiles="with NO BOM" />
+</project>

src/.idea/.idea.NzbDrone/.idea/misc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="com.jetbrains.rider.android.RiderAndroidMiscFileCreationComponent">
+    <option name="ENSURE_MISC_FILE_EXISTS" value="true" />
+  </component>
+</project>

src/NzbDrone.Common/Disk/DiskProviderBase.cs

@@ -123,27 +123,6 @@ namespace NzbDrone.Common.Disk
             }
         }
 
-        public bool IsValidGDIPlusImage(string filename)
-        {
-            if (!CanUseGDIPlus())
-            {
-                return true;
-            }
-
-            try
-            {
-                using (var bmp = new Bitmap(filename))
-                {
-                }
-                return true;
-            }
-            catch (Exception ex)
-            {
-                Logger.Debug(ex, "Corrupted image found at: {0}.", filename);
-                return false;
-            }
-        }
-
         public bool FolderWritable(string path)
         {
             Ensure.That(path, () => path).IsValidPath();

src/NzbDrone.Common/Disk/IDiskProvider.cs

@@ -20,7 +20,6 @@ namespace NzbDrone.Common.Disk
         bool FileExists(string path);
         bool FileExists(string path, StringComparison stringComparison);
         bool CanUseGDIPlus();
-        bool IsValidGDIPlusImage(string path);
         bool FolderWritable(string path);
         string[] GetDirectories(string path);
         string[] GetFiles(string path, SearchOption searchOption);

src/NzbDrone.Core.Test/MediaCoverTests/CoverExistsSpecificationFixture.cs

@@ -37,15 +37,6 @@ namespace NzbDrone.Core.Test.MediaCoverTests
 
         }
 
-        private void GivenImageFileCorrupt(bool corrupt)
-        {
-            GivenFileExistsOnDisk();
-            Mocker.GetMock<IDiskProvider>()
-                .Setup(c => c.IsValidGDIPlusImage(It.IsAny<string>()))
-                .Returns(!corrupt);
-        }
-
-
         [Test]
         public void should_return_false_if_file_not_exists()
         {
@@ -61,21 +52,11 @@ namespace NzbDrone.Core.Test.MediaCoverTests
             Subject.AlreadyExists("http://url", "c:\\file.exe").Should().BeFalse();
         }
 
-        [Test]
-        public void should_return_false_if_file_exists_and_same_size_and_corrupt()
-        {
-            GivenExistingFileSize(100);
-            GivenImageFileCorrupt(true);
-            _httpResponse.Headers.ContentLength = 100;
-            Subject.AlreadyExists("http://url", "c:\\file.exe").Should().BeFalse();
-        }
-
 
         [Test]
         public void should_return_true_if_file_exists_and_same_size_and_not_corrupt()
         {
             GivenExistingFileSize(100);
-            GivenImageFileCorrupt(false);
             _httpResponse.Headers.ContentLength = 100;
             Subject.AlreadyExists("http://url", "c:\\file.exe").Should().BeTrue();
         }

src/NzbDrone.Core/MediaCover/CoverAlreadyExistsSpecification.cs

@@ -31,12 +31,6 @@ namespace NzbDrone.Core.MediaCover
                 return false;
             }
 
-            if (!_diskProvider.IsValidGDIPlusImage(path))
-            {
-                _diskProvider.DeleteFile(path);
-                return false;
-            }
-
             var headers = _httpClient.Head(new HttpRequest(url)).Headers;
             var fileSize = _diskProvider.GetFileSize(path);
             return fileSize == headers.ContentLength;

src/NzbDrone.sln.DotSettings

@@ -74,6 +74,7 @@
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpKeepExistingMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpPlaceEmbeddedOnSameLineMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpRenamePlacementToArrangementMigration/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpUseContinuousIndentInsideBracesMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EAddAccessorOwnerDeclarationBracesMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002ECSharpPlaceAttributeOnSameLineMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EMigrateBlankLinesAroundFieldToBlankLinesAroundProperty/@EntryIndexedValue">True</s:Boolean>