将异常传递给方法并引发此类异常

Question

如何将异常传递给方法并在此方法中抛出该类型的异常>

这是我的尝试：

    public static void AgainstNull<T, D>(T value, string paramName, D exception, string message)
        where T : class
        where D : Exception
    {
        if (value == null)
        {
            throw new exception(paramName, message);
        }
    }

和用法：

        User user = await this.userManager.FindByNameAsync(assignRoleModel.Username);
        Guard.AgainstNull(user, nameof(user), ArgumentNullException, ErrorMessages.FindUserByNameError);