Tweak to make hash cache load

src/BingWallpaper.csproj

@@ -45,6 +45,7 @@
   <ItemGroup>
     <Compile Include="BingInteractionAndParsing.cs" />
     <Compile Include="ConsoleWriter.cs" />
+    <Compile Include="HistogramHash.cs" />
     <Compile Include="ImageHashing.cs" />
     <Compile Include="ImageMetadataPropertyId.cs" />
     <Compile Include="ImagePropertyHandling.cs" />

src/HistogramHash.cs

@@ -0,0 +1,22 @@
+using System.Collections.Generic;
+using System.Linq;
+
+namespace BingWallpaper
+{
+    public class HistogramHash
+    {
+        public readonly string FilePath;
+        public readonly int[] HashValue;
+
+        public HistogramHash(string filePath, int[] values)
+        {
+            FilePath = filePath;
+            HashValue = values;
+        }
+
+        public bool Equal(HistogramHash other)
+        {
+            return HashValue.SequenceEqual(other.HashValue);
+        }
+    }
+}

src/ImageHashing.cs

@@ -19,7 +19,7 @@ internal static bool ImageInHash(string tempfilename)
 
         internal static void AddHash(string filePath)
         {
-            if(HistogramHashTable.Any(x=>x.filePath == filePath)) return;
+            if(HistogramHashTable.Any(x=>x.FilePath == filePath)) return;
 
             HistogramHashTable.Add(GetRGBHistogram(filePath));
         }
@@ -44,24 +44,7 @@ internal static HistogramHash GetRGBHistogram(string file)
 
             File.Delete(histogramfile);
 
-            return new HistogramHash(file, values);
-        }
-    }
-
-    internal class HistogramHash
-    {
-        internal readonly string filePath;
-        internal readonly int[] HashValue;
-
-        public HistogramHash(string filePath, List<int> values)
-        {
-            this.filePath = filePath;
-            HashValue = values.ToArray();
-        }
-
-        public bool Equal(HistogramHash other)
-        {
-            return HashValue.SequenceEqual(other.HashValue);
+            return new HistogramHash(file, values.ToArray());
         }
     }
 }

src/SetupAndTearDown.cs

@@ -29,6 +29,11 @@ internal static void Startup()
             ConsoleWriter.WriteLine("Have loaded {0} previous hashes", ImageHashing.HistogramHashTable.Count);
 
             HashExistingImages();
+
+            if (ImageHashing.HistogramHashTable.Any())
+            {
+                Serializer.Serialize(ImageHashing.HistogramHashTable, Path.Combine(Program.AppData, "imageHistogram.bin"));
+            }
 
             ClearLogFiles(logPath);
         }