Add project files.

CsharpCorne/CsharpCorner.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="HtmlAgilityPack" Version="1.11.34" />
+  </ItemGroup>
+
+</Project>

CsharpCorne/Program.cs

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+using HtmlAgilityPack;
+using System;
+using System.Linq;
+
+namespace CsharpCorner
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            var web = new HtmlWeb();
+            var doc = web.Load("https://www.avanza.se/aktier/lista.html");
+            var headerNames = doc.DocumentNode
+                .SelectNodes("//a[@class='ellipsis']").ToList();
+        }
+    }
+}