Close files, GC can take too long and the OS will trash us.

DiscImageChef/ImagePlugins/ZZZRawImage.cs

@@ -102,6 +102,7 @@ namespace DiscImageChef.ImagePlugins
         {
             FileStream stream = new FileStream(imagePath, FileMode.Open, FileAccess.Read);
             stream.Seek(0, SeekOrigin.Begin);
+            stream.Close();
 
             FileInfo fi = new FileInfo(imagePath);
             string extension = Path.GetExtension(imagePath).ToLower();
@@ -294,6 +295,8 @@ namespace DiscImageChef.ImagePlugins
 
                 stream.Read(buffer, 0, (int)(length * sectorSize));
 
+                stream.Close();
+
                 return buffer;
 
             }