Fix SD-1874 - Attribute code completion not working for assemblies that reference assemblies using a different .NET framework version to those referenced by the project.

src/Main/Base/Project/Src/Services/ParserService/ParseProjectContent.cs

@@ -104,7 +104,7 @@ namespace ICSharpCode.SharpDevelop
 			}
 			foreach (IProjectContent referencedContent in referencedContents) {
 				if (referencedContent is ReflectionProjectContent) {
-					((ReflectionProjectContent)referencedContent).InitializeReferences();
+					((ReflectionProjectContent)referencedContent).InitializeReferences(referencedContents);
 				}
 			}
 		}
@@ -262,7 +262,7 @@ namespace ICSharpCode.SharpDevelop
 				
 				foreach (IProjectContent referencedContent in referencedContents) {
 					if (referencedContent is ReflectionProjectContent) {
-						((ReflectionProjectContent)referencedContent).InitializeReferences();
+						((ReflectionProjectContent)referencedContent).InitializeReferences(referencedContents);
 					}
 				}
 				

src/Main/ICSharpCode.SharpDevelop.Dom/Project/Src/ProjectContent/ReflectionProjectContent.cs

@@ -4,8 +4,8 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Linq;
 using System.Reflection;
-
 using ICSharpCode.SharpDevelop.Dom.ReflectionLayer;
 
 namespace ICSharpCode.SharpDevelop.Dom
@@ -162,12 +162,17 @@ namespace ICSharpCode.SharpDevelop.Dom
 		List<DomAssemblyName> missingNames;
 		
 		public void InitializeReferences()
+		{
+			InitializeReferences(new IProjectContent[0]);
+		}
+		
+		public void InitializeReferences(IProjectContent[] existingContents)
 		{
 			bool changed = false;
 			if (initialized) {
 				if (missingNames != null) {
 					for (int i = 0; i < missingNames.Count; i++) {
-						IProjectContent content = registry.GetExistingProjectContent(missingNames[i]);
+						IProjectContent content = GetExistingProjectContent(existingContents, missingNames[i]);
 						if (content != null) {
 							changed = true;
 							lock (ReferencedContents) {
@@ -200,6 +205,22 @@ namespace ICSharpCode.SharpDevelop.Dom
 				OnReferencedContentsChanged(EventArgs.Empty);
 		}
 		
+		IProjectContent GetExistingProjectContent(IProjectContent[] existingProjectContents, DomAssemblyName fullAssemblyName)
+		{
+			IProjectContent content = registry.GetExistingProjectContent(fullAssemblyName);
+			if (content != null) {
+				return content;
+			} else if (existingProjectContents.Any()) {
+				return GetExistingProjectContentForShortName(existingProjectContents, fullAssemblyName.ShortName);
+			}
+			return null;
+		}
+		
+		IProjectContent GetExistingProjectContentForShortName(IProjectContent[] existingProjectContents, string shortName)
+		{
+			return existingProjectContents.FirstOrDefault(pc => pc.AssemblyName == shortName);
+		}
+		
 		public override string ToString()
 		{
 			return string.Format("[{0}: {1}]", GetType().Name, assemblyFullName);