Use gray text color for non-public types and members. Closes #143.

ILSpy/TreeNodes/EventTreeNode.cs

@@ -108,6 +108,14 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			language.DecompileEvent(ev, output, options);
 		}
 		
+		
+		public override bool IsPublicAPI {
+			get {
+				MethodDefinition accessor = ev.AddMethod ?? ev.RemoveMethod;
+				return accessor != null && (accessor.IsPublic || accessor.IsFamilyOrAssembly || accessor.IsFamily);
+			}
+		}
+		
 		MemberReference IMemberTreeNode.Member
 		{
 			get { return ev; }

ILSpy/TreeNodes/FieldTreeNode.cs

@@ -112,6 +112,12 @@ namespace ICSharpCode.ILSpy.TreeNodes
 		{
 			language.DecompileField(field, output, options);
 		}
+		
+		public override bool IsPublicAPI {
+			get {
+				return field.IsPublic || field.IsFamily || field.IsFamilyOrAssembly;
+			}
+		}
 
 		MemberReference IMemberTreeNode.Member
 		{

ILSpy/TreeNodes/ILSpyTreeNode.cs

@@ -166,5 +166,18 @@ namespace ICSharpCode.ILSpy.TreeNodes
 					ApplyFilterToChild(node);
 			}
 		}
+		
+		public virtual bool IsPublicAPI {
+			get { return true; }
+		}
+		
+		public override System.Windows.Media.Brush Foreground {
+			get {
+				if (IsPublicAPI)
+					return base.Foreground;
+				else
+					return System.Windows.SystemColors.GrayTextBrush;
+			}
+		}
 	}
 }

ILSpy/TreeNodes/MethodTreeNode.cs

@@ -137,6 +137,12 @@ namespace ICSharpCode.ILSpy.TreeNodes
 				return FilterResult.Hidden;
 		}
 
+		public override bool IsPublicAPI {
+			get {
+				return method.IsPublic || method.IsFamily || method.IsFamilyOrAssembly;
+			}
+		}
+		
 		MemberReference IMemberTreeNode.Member
 		{
 			get { return method; }

ILSpy/TreeNodes/PropertyTreeNode.cs

@@ -148,6 +148,19 @@ namespace ICSharpCode.ILSpy.TreeNodes
 		{
 			language.DecompileProperty(property, output, options);
 		}
+		
+		public override bool IsPublicAPI {
+			get {
+				switch (GetAttributesOfMostAccessibleMethod(property) & MethodAttributes.MemberAccessMask) {
+					case MethodAttributes.Public:
+					case MethodAttributes.Family:
+					case MethodAttributes.FamORAssem:
+						return true;
+					default:
+						return false;
+				}
+			}
+		}
 
 		MemberReference IMemberTreeNode.Member
 		{

ILSpy/TreeNodes/TypeTreeNode.cs

@@ -62,7 +62,7 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			get { return HighlightSearchMatch(this.Language.FormatTypeName(type)); }
 		}
 		
-		public bool IsPublicAPI {
+		public override bool IsPublicAPI {
 			get {
 				switch (type.Attributes & TypeAttributes.VisibilityMask) {
 					case TypeAttributes.Public:

ILSpy/XmlDoc/XmlDocLoader.cs

@@ -99,6 +99,9 @@ namespace ICSharpCode.ILSpy.XmlDoc
 		
 		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);

SharpTreeView/SharpTreeNode.cs

@@ -12,6 +12,7 @@ using System.Collections.ObjectModel;
 using System.Windows.Controls;
 using System.Collections.Specialized;
 using System.Windows.Input;
+using System.Windows.Media;
 
 namespace ICSharpCode.TreeView
 {
@@ -101,6 +102,10 @@ namespace ICSharpCode.TreeView
 			get { return null; }
 		}
 		
+		public virtual Brush Foreground {
+			get { return SystemColors.WindowTextBrush; }
+		}
+		
 		public virtual object Icon
 		{
 			get { return null; }

SharpTreeView/Themes/Generic.xaml

@@ -181,6 +181,7 @@
                     <Border Background="Transparent">
                         <Border Background="{TemplateBinding Background}">
                             <Default:SharpTreeNodeView Name="nodeView"
+                                                       Foreground="{Binding Foreground}"
                                                        HorizontalAlignment="Left" />
                         </Border>
                     </Border>
@@ -210,7 +211,8 @@
                         </MultiTrigger>-->
                         <Trigger Property="IsEnabled"
                                  Value="False">
-                            <Setter Property="Foreground"
+                            <Setter TargetName="nodeView"
+                                    Property="Foreground"
                                     Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}" />
                         </Trigger>
                     </ControlTemplate.Triggers>