//FIXME: this is totally broken. assemblies can't just belong to one framework
        public TargetFrameworkMoniker GetTargetFrameworkForAssembly(TargetRuntime tr, string file)
        {
            var universe = new IKVM.Reflection.Universe();

            universe.EnableMissingMemberResolution();
            try {
                IKVM.Reflection.Assembly assembly = universe.LoadFile(file);
                var att = assembly.CustomAttributes.FirstOrDefault(a =>
                                                                   a.AttributeType.FullName == "System.Runtime.Versioning.TargetFrameworkAttribute"
                                                                   );
                if (att != null)
                {
                    if (att.ConstructorArguments.Count == 1)
                    {
                        var v = att.ConstructorArguments[0].Value as string;
                        TargetFrameworkMoniker m;
                        if (v != null && TargetFrameworkMoniker.TryParse(v, out m))
                        {
                            return(m);
                        }
                    }
                    LoggingService.LogError("Invalid TargetFrameworkAttribute in assembly {0}", file);
                }

                foreach (var r in assembly.GetReferencedAssemblies())
                {
                    if (r.Name == "mscorlib")
                    {
                        TargetFramework compatibleFramework = null;
                        // If there are several frameworks that can run the file, pick one that is installed
                        foreach (TargetFramework tf in GetKnownFrameworks())
                        {
                            if (tf.GetCorlibVersion() == r.Version.ToString())
                            {
                                compatibleFramework = tf;
                                if (tr.IsInstalled(tf))
                                {
                                    return(tf.Id);
                                }
                            }
                        }
                        if (compatibleFramework != null)
                        {
                            return(compatibleFramework.Id);
                        }
                        break;
                    }
                }
            } catch (Exception ex) {
                LoggingService.LogError("Error to determine target framework for assembly {0}: {1}", file, ex);
                return(TargetFrameworkMoniker.UNKNOWN);
            } finally {
                universe.Dispose();
            }
            LoggingService.LogError("Failed to determine target framework for assembly {0}", file);
            return(TargetFrameworkMoniker.UNKNOWN);
        }
		//FIXME: this is totally broken. assemblies can't just belong to one framework
		public TargetFrameworkMoniker GetTargetFrameworkForAssembly (TargetRuntime tr, string file)
		{
			var universe = new IKVM.Reflection.Universe ();
			universe.EnableMissingMemberResolution ();
			try {
				IKVM.Reflection.Assembly assembly = universe.LoadFile (file);
				var att = assembly.CustomAttributes.FirstOrDefault (a =>
					a.AttributeType.FullName == "System.Runtime.Versioning.TargetFrameworkAttribute"
				);
				if (att != null) {
					if (att.ConstructorArguments.Count == 1) {
						var v = att.ConstructorArguments[0].Value as string;
						TargetFrameworkMoniker m;
						if (v != null && TargetFrameworkMoniker.TryParse (v, out m)) {
							return m;
						}
					}
					LoggingService.LogError ("Invalid TargetFrameworkAttribute in assembly {0}", file);
				}

				foreach (var r in assembly.GetReferencedAssemblies ()) {
					if (r.Name == "mscorlib") {
						TargetFramework compatibleFramework = null;
						// If there are several frameworks that can run the file, pick one that is installed
						foreach (TargetFramework tf in GetKnownFrameworks ()) {
							if (tf.GetCorlibVersion () == r.Version.ToString ()) {
								compatibleFramework = tf;
								if (tr.IsInstalled (tf))
									return tf.Id;
							}
						}
						if (compatibleFramework != null)
							return compatibleFramework.Id;
						break;
					}
				}
			} catch (Exception ex) {
				LoggingService.LogError ("Error to determine target framework for assembly {0}: {1}", file, ex);
				return TargetFrameworkMoniker.UNKNOWN;
			} finally {
				universe.Dispose ();
			}
			LoggingService.LogError ("Failed to determine target framework for assembly {0}", file);
			return TargetFrameworkMoniker.UNKNOWN;
		}