System.Linq.Expressions.Expression.MakeMemberAccess C# (CSharp) Method

        public static MemberExpression MakeMemberAccess(Expression expression, MemberInfo member)
        {
            ContractUtils.RequiresNotNull(member, nameof(member));

            FieldInfo fi = member as FieldInfo;
            if (fi != null)
            {
                return Expression.Field(expression, fi);
            }
            PropertyInfo pi = member as PropertyInfo;
            if (pi != null)
            {
                return Expression.Property(expression, pi);
            }
            throw Error.MemberNotFieldOrProperty(member, nameof(member));
        }
    }

    private static Accessor GetAccessor <TAttribute>(Type targetType)
        where TAttribute : Attribute
    {
        Accessor accessor;
        var      cache = GetCache <TAttribute>();

        if (cache.TryGetValue(targetType, out accessor))
        {
            return(accessor);
        }
        var member = FindMember <TAttribute>(targetType);

        if (member == null)
        {
            cache[targetType] = NullCallback;
            return(NullCallback);
        }
        var targetParameter    = E.Parameter(typeof(object), "target");
        var accessorExpression = E.Lambda <Accessor>(
            E.Convert(
                E.MakeMemberAccess(
                    E.Convert(targetParameter, targetType),
                    member),
                typeof(object)),
            targetParameter);

        accessor          = accessorExpression.Compile();
        cache[targetType] = accessor;
        return(accessor);
    }