OverloadResolutionErrors IsUnambiguousCall(ExpectedTargetDetails expectedTargetDetails, IMethod method, TranslatedExpression target, IType[] typeArguments, IList <TranslatedExpression> arguments) { var lookup = new MemberLookup(resolver.CurrentTypeDefinition, resolver.CurrentTypeDefinition.ParentAssembly); var or = new OverloadResolution(resolver.Compilation, arguments.SelectArray(a => a.ResolveResult), typeArguments: typeArguments); if (expectedTargetDetails.CallOpCode == OpCode.NewObj) { foreach (IMethod ctor in method.DeclaringType.GetConstructors()) { if (lookup.IsAccessible(ctor, allowProtectedAccess: resolver.CurrentTypeDefinition == method.DeclaringTypeDefinition)) { or.AddCandidate(ctor); } } } else { var result = lookup.Lookup(target.ResolveResult, method.Name, EmptyList <IType> .Instance, true) as MethodGroupResolveResult; if (result == null) { return(OverloadResolutionErrors.AmbiguousMatch); } or.AddMethodLists(result.MethodsGroupedByDeclaringType.ToArray()); } if (or.BestCandidateErrors != OverloadResolutionErrors.None) { return(or.BestCandidateErrors); } if (!IsAppropriateCallTarget(expectedTargetDetails, method, or.GetBestCandidateWithSubstitutedTypeArguments())) { return(OverloadResolutionErrors.AmbiguousMatch); } return(OverloadResolutionErrors.None); }