Fix SymbolCollector not returning a member when it was implementing interface members.

src/Libraries/NRefactory/ICSharpCode.NRefactory/Analysis/SymbolCollector.cs

@@ -120,13 +120,11 @@ namespace ICSharpCode.NRefactory.Analysis
 			case SymbolKind.Method: {
 				var member = (IMember)m;
 				List<ISymbol> symbols = new List<ISymbol> ();
-				if (member.ImplementedInterfaceMembers.Count > 0) {
+				if (!member.IsExplicitInterfaceImplementation)
+					symbols.Add (member);
 				foreach (var m2 in member.ImplementedInterfaceMembers) {
 					symbols.AddRange (GetRelatedSymbols (g, m2));
 				}
-				} else {
-					symbols.Add (member);
-				}
 
 				if (member.DeclaringType.Kind == TypeKind.Interface) {
 					var declaringTypeNode = g.GetNode(member.DeclaringTypeDefinition);