diff --git a/ICSharpCode.Decompiler/Documentation/XmlDocLoader.cs b/ICSharpCode.Decompiler/Documentation/XmlDocLoader.cs
index b922beeef..690eca689 100644
--- a/ICSharpCode.Decompiler/Documentation/XmlDocLoader.cs
+++ b/ICSharpCode.Decompiler/Documentation/XmlDocLoader.cs
@@ -18,6 +18,7 @@
 
 using System;
 using System.Diagnostics;
+using System.Globalization;
 using System.IO;
 using System.Runtime.CompilerServices;
 
@@ -104,26 +105,37 @@ namespace ICSharpCode.Decompiler.Documentation
 			return fileName;
 		}
 
-		static string LookupLocalizedXmlDoc(string fileName)
+		/// <summary>
+		/// Given the assembly file name, looks up the XML documentation file name.
+		/// Returns null if no XML documentation file is found.
+		/// </summary>
+		internal static string LookupLocalizedXmlDoc(string fileName)
 		{
 			if (string.IsNullOrEmpty(fileName))
 				return null;
 
 			string xmlFileName = Path.ChangeExtension(fileName, ".xml");
-			string currentCulture = System.Threading.Thread.CurrentThread.CurrentUICulture.TwoLetterISOLanguageName;
-			string localizedXmlDocFile = GetLocalizedName(xmlFileName, currentCulture);
+
+			CultureInfo currentCulture = System.Threading.Thread.CurrentThread.CurrentUICulture;
+			string localizedXmlDocFile = GetLocalizedName(xmlFileName, currentCulture.Name);
+			string localizedXmlDocFallbackFile = GetLocalizedName(xmlFileName, currentCulture.TwoLetterISOLanguageName);
 
 			Debug.WriteLine("Try find XMLDoc @" + localizedXmlDocFile);
 			if (File.Exists(localizedXmlDocFile))
 			{
 				return localizedXmlDocFile;
 			}
+			Debug.WriteLine("Try find XMLDoc @" + localizedXmlDocFallbackFile);
+			if (File.Exists(localizedXmlDocFallbackFile))
+			{
+				return localizedXmlDocFallbackFile;
+			}
 			Debug.WriteLine("Try find XMLDoc @" + xmlFileName);
 			if (File.Exists(xmlFileName))
 			{
 				return xmlFileName;
 			}
-			if (currentCulture != "en")
+			if (currentCulture.TwoLetterISOLanguageName != "en")
 			{
 				string englishXmlDocFile = GetLocalizedName(xmlFileName, "en");
 				Debug.WriteLine("Try find XMLDoc @" + englishXmlDocFile);
@@ -135,12 +147,9 @@ namespace ICSharpCode.Decompiler.Documentation
 			return null;
 		}
 
-		static string GetLocalizedName(string fileName, string language)
+		private static string GetLocalizedName(string fileName, string language)
 		{
-			string localizedXmlDocFile = Path.GetDirectoryName(fileName);
-			localizedXmlDocFile = Path.Combine(localizedXmlDocFile, language);
-			localizedXmlDocFile = Path.Combine(localizedXmlDocFile, Path.GetFileName(fileName));
-			return localizedXmlDocFile;
+			return Path.Combine(Path.GetDirectoryName(fileName), language, Path.GetFileName(fileName));
 		}
 	}
 }
diff --git a/ICSharpCode.Decompiler/Documentation/XmlDocumentationProvider.cs b/ICSharpCode.Decompiler/Documentation/XmlDocumentationProvider.cs
index 1f0b2da72..cae69da09 100644
--- a/ICSharpCode.Decompiler/Documentation/XmlDocumentationProvider.cs
+++ b/ICSharpCode.Decompiler/Documentation/XmlDocumentationProvider.cs
@@ -185,7 +185,7 @@ namespace ICSharpCode.Decompiler.Documentation
 				.Replace("%CORSYSDIR%", corSysDir);
 			if (!Path.IsPathRooted(fileName))
 				fileName = Path.Combine(Path.GetDirectoryName(xmlFileName), fileName);
-			return LookupLocalizedXmlDoc(fileName);
+			return XmlDocLoader.LookupLocalizedXmlDoc(fileName);
 		}
 
 		static string AppendDirectorySeparator(string dir)
@@ -196,45 +196,6 @@ namespace ICSharpCode.Decompiler.Documentation
 				return dir + Path.DirectorySeparatorChar;
 		}
 
-		/// <summary>
-		/// Given the assembly file name, looks up the XML documentation file name.
-		/// Returns null if no XML documentation file is found.
-		/// </summary>
-		public static string LookupLocalizedXmlDoc(string fileName)
-		{
-			string xmlFileName = Path.ChangeExtension(fileName, ".xml");
-			string currentCulture = System.Threading.Thread.CurrentThread.CurrentUICulture.TwoLetterISOLanguageName;
-			string localizedXmlDocFile = GetLocalizedName(xmlFileName, currentCulture);
-
-			Debug.WriteLine("Try find XMLDoc @" + localizedXmlDocFile);
-			if (File.Exists(localizedXmlDocFile))
-			{
-				return localizedXmlDocFile;
-			}
-			Debug.WriteLine("Try find XMLDoc @" + xmlFileName);
-			if (File.Exists(xmlFileName))
-			{
-				return xmlFileName;
-			}
-			if (currentCulture != "en")
-			{
-				string englishXmlDocFile = GetLocalizedName(xmlFileName, "en");
-				Debug.WriteLine("Try find XMLDoc @" + englishXmlDocFile);
-				if (File.Exists(englishXmlDocFile))
-				{
-					return englishXmlDocFile;
-				}
-			}
-			return null;
-		}
-
-		static string GetLocalizedName(string fileName, string language)
-		{
-			string localizedXmlDocFile = Path.GetDirectoryName(fileName);
-			localizedXmlDocFile = Path.Combine(localizedXmlDocFile, language);
-			localizedXmlDocFile = Path.Combine(localizedXmlDocFile, Path.GetFileName(fileName));
-			return localizedXmlDocFile;
-		}
 		#endregion
 
 		#region Load / Create Index