diff --git a/Enigmatry.Entry.Core.EntityFramework/EntityQueryableExtensions.cs b/Enigmatry.Entry.Core.EntityFramework/EntityQueryableExtensions.cs
index 84fb6f0..2f1ca13 100644
--- a/Enigmatry.Entry.Core.EntityFramework/EntityQueryableExtensions.cs
+++ b/Enigmatry.Entry.Core.EntityFramework/EntityQueryableExtensions.cs
@@ -1,102 +1,102 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Linq.Dynamic.Core;
-using System.Threading;
-using System.Threading.Tasks;
-using AutoMapper;
-using Enigmatry.Entry.Core.Entities;
-using Enigmatry.Entry.Core.Paging;
-using Microsoft.EntityFrameworkCore;
-
-namespace Enigmatry.Entry.Core.EntityFramework;
-
-public static class EntityQueryableExtensions
-{
-    public static async Task<T> SingleOrNotFoundAsync<T>(this IQueryable<T> query,
-        CancellationToken cancellationToken = default)
-    {
-        var result = await query.SingleOrDefaultAsync(cancellationToken);
-        return result ?? throw new EntityNotFoundException(typeof(T).Name);
-    }
-
-    public static async Task<TDestination> SingleOrDefaultMappedAsync<TSource, TDestination>(
-        this IQueryable<TSource> query, IMapper mapper, CancellationToken cancellationToken = default)
-    {
-        var item = await query.SingleOrDefaultAsync(cancellationToken);
-        return mapper.Map<TDestination>(item);
-    }
-
-    public static async Task<List<TDestination>> ToListMappedAsync<TSource, TDestination>(
-        this IQueryable<TSource> query, IMapper mapper, CancellationToken cancellationToken = default)
-    {
-        var items = await query.ToListAsync(cancellationToken);
-        return mapper.Map<List<TDestination>>(items);
-    }
-
-    public static PagedResponse<T> ToPagedResponse<T>(this IQueryable<T> query, IPagedRequest request)
-    {
-        if (request == null)
-        {
-            throw new ArgumentNullException(nameof(request));
-        }
-
-        var pagedQuery = query
-            .OrderByDynamic(request.SortBy, request.SortDirection);
-
-        var skipPaging = request.PageSize == Int32.MaxValue;
-
-        if (!skipPaging)
-        {
-            pagedQuery = pagedQuery.Skip((request.PageNumber - 1) * request.PageSize)
-                .Take(request.PageSize);
-        }
-
-        var items = pagedQuery.ToList();
-
-        var totalCount = skipPaging ? items.Count : query.Count();
-
-        return new PagedResponse<T>
-        {
-            Items = items,
-            TotalCount = totalCount,
-            PageSize = request.PageSize,
-            PageNumber = request.PageNumber
-        };
-    }
-
-    public static async Task<PagedResponse<T>> ToPagedResponseAsync<T>(this IQueryable<T> query, IPagedRequest request,
-        CancellationToken cancellationToken = default)
-    {
-        if (request == null)
-        {
-            throw new ArgumentNullException(nameof(request));
-        }
-
-        var pagedQuery = query
-            .OrderByDynamic(request.SortBy, request.SortDirection);
-
-        var skipPaging = request.PageSize == Int32.MaxValue;
-
-        if (!skipPaging)
-        {
-            pagedQuery = pagedQuery.Skip((request.PageNumber - 1) * request.PageSize)
-                .Take(request.PageSize);
-        }
-
-        var items = await pagedQuery.ToListAsync(cancellationToken);
-
-        var totalCount = skipPaging ? items.Count : await query.CountAsync(cancellationToken);
-
-        return new PagedResponse<T>
-        {
-            Items = items,
-            TotalCount = totalCount,
-            PageSize = request.PageSize,
-            PageNumber = request.PageNumber
-        };
-    }
-
-    private static IQueryable<T> OrderByDynamic<T>(this IQueryable<T> query, string? orderBy, string? orderDirection) =>
-        String.IsNullOrWhiteSpace(orderBy) ? query : query.OrderBy($"{orderBy} {orderDirection}");
-}
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Dynamic.Core;
+using System.Threading;
+using System.Threading.Tasks;
+using AutoMapper;
+using Enigmatry.Entry.Core.Entities;
+using Enigmatry.Entry.Core.Paging;
+using Microsoft.EntityFrameworkCore;
+
+namespace Enigmatry.Entry.Core.EntityFramework;
+
+public static class EntityQueryableExtensions
+{
+    public static async Task<T> SingleOrNotFoundAsync<T>(this IQueryable<T> query,
+        CancellationToken cancellationToken = default)
+    {
+        var result = await query.SingleOrDefaultAsync(cancellationToken);
+        return result ?? throw new EntityNotFoundException(typeof(T).Name);
+    }
+
+    public static async Task<TDestination> SingleOrDefaultMappedAsync<TSource, TDestination>(
+        this IQueryable<TSource> query, IMapper mapper, CancellationToken cancellationToken = default)
+    {
+        var item = await query.SingleOrDefaultAsync(cancellationToken);
+        return mapper.Map<TDestination>(item);
+    }
+
+    public static async Task<List<TDestination>> ToListMappedAsync<TSource, TDestination>(
+        this IQueryable<TSource> query, IMapper mapper, CancellationToken cancellationToken = default)
+    {
+        var items = await query.ToListAsync(cancellationToken);
+        return mapper.Map<List<TDestination>>(items);
+    }
+
+    public static PagedResponse<T> ToPagedResponse<T>(this IQueryable<T> query, IPagedRequest request)
+    {
+        if (request == null)
+        {
+            throw new ArgumentNullException(nameof(request));
+        }
+
+        var pagedQuery = query
+            .OrderByDynamic(request.SortBy, request.SortDirection);
+
+        var skipPaging = request.PageSize == Int32.MaxValue;
+
+        if (!skipPaging)
+        {
+            pagedQuery = pagedQuery.Skip((request.PageNumber - 1) * request.PageSize)
+                .Take(request.PageSize);
+        }
+
+        var items = pagedQuery.ToList();
+
+        var totalCount = skipPaging ? items.Count : query.Count();
+
+        return new PagedResponse<T>
+        {
+            Items = items,
+            TotalCount = totalCount,
+            PageSize = request.PageSize,
+            PageNumber = request.PageNumber
+        };
+    }
+
+    public static async Task<PagedResponse<T>> ToPagedResponseAsync<T>(this IQueryable<T> query, IPagedRequest request,
+        CancellationToken cancellationToken = default)
+    {
+        if (request == null)
+        {
+            throw new ArgumentNullException(nameof(request));
+        }
+
+        var pagedQuery = query
+            .OrderByDynamic(request.SortBy, request.SortDirection);
+
+        var skipPaging = request.PageSize == Int32.MaxValue;
+
+        if (!skipPaging)
+        {
+            pagedQuery = pagedQuery.Skip((request.PageNumber - 1) * request.PageSize)
+                .Take(request.PageSize);
+        }
+
+        var items = await pagedQuery.ToListAsync(cancellationToken);
+
+        var totalCount = skipPaging ? items.Count : await query.CountAsync(cancellationToken);
+
+        return new PagedResponse<T>
+        {
+            Items = items,
+            TotalCount = totalCount,
+            PageSize = request.PageSize,
+            PageNumber = request.PageNumber
+        };
+    }
+
+    private static IQueryable<T> OrderByDynamic<T>(this IQueryable<T> query, string? orderBy, string orderDirection = "asc") =>
+        String.IsNullOrWhiteSpace(orderBy) ? query : query.OrderBy($"{orderBy} {orderDirection}");
+}
diff --git a/Enigmatry.Entry.Core/Paging/IPagedRequest.cs b/Enigmatry.Entry.Core/Paging/IPagedRequest.cs
index fe087b6..39679c0 100644
--- a/Enigmatry.Entry.Core/Paging/IPagedRequest.cs
+++ b/Enigmatry.Entry.Core/Paging/IPagedRequest.cs
@@ -4,7 +4,7 @@ public interface IPagedRequest
     {
         int PageNumber { get; set; }
         int PageSize { get; set; }
-        string? SortBy { get; set; }
-        string? SortDirection { get; set; }
+        string SortBy { get; set; }
+        string SortDirection { get; set; }
     }
 }
diff --git a/Enigmatry.Entry.Core/Paging/PagedRequest.cs b/Enigmatry.Entry.Core/Paging/PagedRequest.cs
index 3027255..533a3d2 100644
--- a/Enigmatry.Entry.Core/Paging/PagedRequest.cs
+++ b/Enigmatry.Entry.Core/Paging/PagedRequest.cs
@@ -1,4 +1,5 @@
-using MediatR;
+using System;
+using MediatR;
 
 namespace Enigmatry.Entry.Core.Paging
 {
@@ -6,7 +7,7 @@ public class PagedRequest<TResponse> : IRequest<PagedResponse<TResponse>>, IPage
     {
         public int PageNumber { get; set; } = 1;
         public int PageSize { get; set; } = 10;
-        public string? SortBy { get; set; }
-        public string? SortDirection { get; set; }
+        public string SortBy { get; set; } = String.Empty;
+        public string SortDirection { get; set; } = String.Empty;
     }
 }