server/src/Admin/Models/PagedModel.cs

using System.Collections.Generic;

namespace Bit.Admin.Models
{
    public abstract class PagedModel<T>
    {
        public List<T> Items { get; set; }
        public int Page { get; set; }
        public int Count { get; set; }
        public int? PreviousPage => Page < 2 ? (int?)null : Page - 1;
        public int? NextPage => Items.Count < Count ? (int?)null : Page + 1;
    }
}