added path casing extension methods.

NzbDrone.Common/PathExtensions.cs

@@ -1,5 +1,4 @@
-using System;
-using System.IO;
+using System.IO;
 using NzbDrone.Common.EnsureThat;
 
 namespace NzbDrone.Common
@@ -32,6 +31,24 @@ namespace NzbDrone.Common
             return info.FullName.Trim('/', '\\', ' ');
         }
 
+        static string GetProperDirectoryCapitalization(DirectoryInfo dirInfo)
+        {
+            var parentDirInfo = dirInfo.Parent;
+            if (null == parentDirInfo)
+                return dirInfo.Name;
+            return Path.Combine(GetProperDirectoryCapitalization(parentDirInfo),
+                                parentDirInfo.GetDirectories(dirInfo.Name)[0].Name);
+        }
+
+        static string GetProperFilePathCapitalization(string filename)
+        {
+            var fileInfo = new FileInfo(filename);
+            DirectoryInfo dirInfo = fileInfo.Directory;
+            return Path.Combine(GetProperDirectoryCapitalization(dirInfo),
+                                dirInfo.GetFiles(fileInfo.Name)[0].Name);
+        }
+
+
         public static string GetAppDataPath(this EnvironmentProvider environmentProvider)
         {
             return Path.Combine(environmentProvider.WorkingDirectory, APP_DATA);