internal LoweredDynamicOperation MakeDynamicUnaryOperator(
            UnaryOperatorKind operatorKind,
            BoundExpression loweredOperand,
            TypeSymbol resultType
            )
        {
            Debug.Assert(operatorKind.IsDynamic());

            _factory.Syntax = loweredOperand.Syntax;

            CSharpBinderFlags binderFlags = 0;

            if (operatorKind.IsChecked())
            {
                binderFlags |= CSharpBinderFlags.CheckedContext;
            }

            var loweredArguments = ImmutableArray.Create(loweredOperand);

            MethodSymbol argumentInfoFactory = GetArgumentInfoFactory();
            var          binderConstruction  =
                ((object)argumentInfoFactory != null)
                    ? MakeBinderConstruction(
                    WellKnownMember.Microsoft_CSharp_RuntimeBinder_Binder__UnaryOperation,
                    new[]
            {
                // flags:
                _factory.Literal((int)binderFlags),
                // expression type:
                _factory.Literal((int)operatorKind.ToExpressionType()),
                // context:
                _factory.TypeofDynamicOperationContextType(),
                // argument infos:
                MakeCallSiteArgumentInfos(argumentInfoFactory, loweredArguments)
            }
                    )
                    : null;

            return(MakeDynamicOperation(
                       binderConstruction,
                       null,
                       RefKind.None,
                       loweredArguments,
                       default(ImmutableArray <RefKind>),
                       null,
                       resultType
                       ));
        }
        internal LoweredDynamicOperation MakeDynamicUnaryOperator(
            UnaryOperatorKind operatorKind,
            BoundExpression loweredOperand,
            TypeSymbol resultType)
        {
            Debug.Assert(operatorKind.IsDynamic());

            _factory.Syntax = loweredOperand.Syntax;

            CSharpBinderFlags binderFlags = 0;
            if (operatorKind.IsChecked())
            {
                binderFlags |= CSharpBinderFlags.CheckedContext;
            }

            var loweredArguments = ImmutableArray.Create(loweredOperand);

            MethodSymbol argumentInfoFactory = GetArgumentInfoFactory();
            var binderConstruction = ((object)argumentInfoFactory != null) ? MakeBinderConstruction(WellKnownMember.Microsoft_CSharp_RuntimeBinder_Binder__UnaryOperation, new[]
            {
                // flags:
                _factory.Literal((int)binderFlags),

                // expression type:
                _factory.Literal((int)operatorKind.ToExpressionType()),

                // context:
                _factory.TypeofDynamicOperationContextType(),

                // argument infos:
                MakeCallSiteArgumentInfos(argumentInfoFactory, loweredArguments)
            }) : null;

            return MakeDynamicOperation(binderConstruction, null, RefKind.None, loweredArguments, ImmutableArray<RefKind>.Empty, null, resultType);
        }