CopyFullyQualifiedTypeNameContextMenuEntry should work on members as well.

ILSpy/ILSpy.csproj

@@ -195,7 +195,7 @@
     <Compile Include="TreeNodes\Analyzer\Helpers.cs" />
     <Compile Include="TreeNodes\Analyzer\ScopedWhereUsedAnalyzer.cs" />
     <Compile Include="TreeNodes\BaseTypesEntryNode.cs" />
-    <Compile Include="TreeNodes\CopyFullyQualifiedTypeNameContextMenuEntry.cs" />
+    <Compile Include="TreeNodes\CopyFullyQualifiedNameContextMenuEntry.cs" />
     <Compile Include="TreeNodes\DerivedTypesEntryNode.cs" />
     <Compile Include="TreeNodes\FilterResult.cs" />
     <Compile Include="TreeNodes\IMemberTreeNode.cs" />

ILSpy/TreeNodes/CopyFullyQualifiedNameContextMenuEntry.cs

@@ -0,0 +1,42 @@
+using System.Windows;
+using Mono.Cecil;
+
+namespace ICSharpCode.ILSpy.TreeNodes
+{
+	[ExportContextMenuEntry(Header = "Copy FQ Name", Icon = "images/Copy.png", Order = 9999)]
+	public class CopyFullyQualifiedNameContextMenuEntry : IContextMenuEntry
+	{
+		public bool IsVisible(TextViewContext context)
+		{
+			return GetMemberNodeFromContext(context) != null;
+		}
+
+		public bool IsEnabled(TextViewContext context) => true;
+
+		public void Execute(TextViewContext context)
+		{
+			var member = GetMemberNodeFromContext(context)?.Member;
+			if (member == null) return;
+			Clipboard.SetText(GetFullyQualifiedName(member));
+		}
+
+		private IMemberTreeNode GetMemberNodeFromContext(TextViewContext context)
+		{
+			return context.SelectedTreeNodes?.Length == 1 ? context.SelectedTreeNodes[0] as IMemberTreeNode : null;
+		}
+
+		/// <summary>
+		/// Resolve full type name using .NET type representation for nested types.
+		/// </summary>
+		private string GetFullyQualifiedName(MemberReference member)
+		{
+			if (member.DeclaringType != null) {
+				if (member is TypeReference)
+					return GetFullyQualifiedName(member.DeclaringType) + "+" + member.Name;
+				else
+					return GetFullyQualifiedName(member.DeclaringType) + "." + member.Name;
+			}
+			return (member is TypeReference t ? t.Namespace + "." : "") + member.Name;
+		}
+	}
+}

ILSpy/TreeNodes/CopyFullyQualifiedTypeNameContextMenuEntry.cs

@@ -1,42 +0,0 @@
-using System.Windows;
-using Mono.Cecil;
-
-namespace ICSharpCode.ILSpy.TreeNodes
-{
-	[ExportContextMenuEntry(Header = "Copy FQ Name", Icon = "images/Copy.png", Order = 9999)]
-	public class CopyFullyQualifiedTypeNameContextMenuEntry : IContextMenuEntry
-	{
-		public bool IsVisible(TextViewContext context)
-		{
-			return GetTypeNodeFromContext(context) != null;
-		}
-
-		public bool IsEnabled(TextViewContext context) => true;
-
-		public void Execute(TextViewContext context)
-		{
-			var typeDefinition = GetTypeNodeFromContext(context)?.TypeDefinition;
-			if (typeDefinition == null) return;
-
-			Clipboard.SetText(GetFullyQualifiedName(typeDefinition));
-		}
-
-		private TypeTreeNode GetTypeNodeFromContext(TextViewContext context)
-		{
-			return context.SelectedTreeNodes?.Length == 1 ? context.SelectedTreeNodes[0] as TypeTreeNode : null;
-		}
-
-		/// <summary>
-		/// Resolve full type name using .NET type representation for nested types.
-		/// </summary>
-		private string GetFullyQualifiedName(TypeDefinition typeDefinition)
-		{
-			if (typeDefinition.IsNested)
-			{
-				return $"{GetFullyQualifiedName(typeDefinition.DeclaringType)}+{typeDefinition.Name}";
-			}
-
-			return $"{typeDefinition.Namespace}.{typeDefinition.Name}";
-		}
-	}
-}

ILSpy/TreeNodes/NaturalStringComparer.cs

@@ -29,9 +29,9 @@ namespace ICSharpCode.ILSpy.TreeNodes
 
 		public static readonly NaturalStringComparer Instance = new NaturalStringComparer();
 
-		public int Compare(string a, string b)
+		public int Compare(string x, string y)
 		{
-			return StrCmpLogicalW(a, b);
+			return StrCmpLogicalW(x, y);
 		}
 	}
 }