Can you check it please?

BenchmarkService.cs

@@ -32,7 +32,7 @@ public BenchmarkService()
         /// and all his/her books (Book Name/Title and Publishment Year) published before 1900
         /// </summary>
         /// <returns></returns>
-        [Benchmark]
+        [Benchmark(Baseline = true)]
         public List<AuthorDTO> GetAuthors()
         {
             using var dbContext = new AppDbContext();
@@ -97,6 +97,51 @@ public List<AuthorDTO> GetAuthors()
 
             return finalAuthors;
         }
+
+        /// Get top 2 Authors (FirstName, LastName, UserName, Email, Age, Country) 
+        /// from country Serbia aged 27, with the highest BooksCount
+        /// and all his/her books (Book Name/Title and Publishment Year) published before 1900
+        [Benchmark]
+        public List<AuthorDto_Optimized> GetAuthors_Optimized_()
+        {
+            using var dbContext = new AppDbContext();
+
+            var orderedAuthors = dbContext.Authors.AsNoTracking()
+                .Where(x => x.Country == "Serbia" && x.Age == 27)
+                .Include(x => x.User)
+                .OrderByDescending(x=>x.BooksCount)
+                .Select(x => new AuthorDto_Optimized
+                {
+
+                    Id = x.Id,
+                    FirstName = x.User.FirstName,
+                    LastName = x.User.LastName,
+                    Email = x.User.Email,
+                    UserName = x.User.UserName,
+                    UserId = x.UserId,
+                    Age = x.Age,
+                    Country = x.Country
+                })
+                .Take(2).ToList();
+
+
+            var userIdArray = orderedAuthors.Select(x => x.Id).ToArray();
+            var dt = new DateTime(1900, 1, 1);
+            var books = dbContext.Books.Where(x => userIdArray.Contains(x.AuthorId) && x.Published < dt).Select(x => new BookStruct()
+            {
+                AuthorId = x.AuthorId,
+                Title = x.Name,
+                PublishedYear = x.Published.Year
+            }).ToList();
+
+            foreach (var auth in orderedAuthors)
+            {
+                auth.Books = books.Where(b => b.AuthorId == auth.Id).ToList();
+            }
+
+            return orderedAuthors;
+        }
+
 
         //[Benchmark]
         //public List<AuthorDTO_Optimized> GetAuthors_Optimized()

DTOs.cs

@@ -0,0 +1,24 @@
+using System.Collections.Generic;
+
+namespace OptimizeMePlease
+{
+    public class AuthorDto_Optimized
+    {
+        public int Id { get; set; }
+        public string FirstName { get; set; }
+        public string LastName { get; set; }
+        public string UserName { get; set; }
+        public string Email { get; set; }
+        public int UserId { get; set; }
+        public int Age { get; set; }
+        public string Country { get; set; }
+        public ICollection<BookStruct> Books { get; set; }
+    }
+
+    public struct BookStruct
+    {
+        public int AuthorId { get; set; }
+        public string Title { get; set; }
+        public int PublishedYear { get; set; }
+    }
+}

OptimizeMePlease.csproj

@@ -2,7 +2,8 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
+    <LangVersion>11</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>

global.json

@@ -0,0 +1,7 @@
+{
+  "sdk": {
+    "version": "7.0.0",
+    "rollForward": "latestMajor",
+    "allowPrerelease": true
+  }
+}