Add project files.

AOC Runner/AOC Runner.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <RootNamespace>AOC.Runner</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

AOC Runner/AOCRunner.cs

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+using AOC.Runner;
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AdventOfCode;
+public class AOCRunner
+{
+	public AOCRunner() 
+	{
+		FindProblemClasses();
+	}
+
+	private void FindProblemClasses()
+	{
+		
+		var types = Assembly.GetExecutingAssembly()?.DefinedTypes.Where(t => t.IsAssignableTo(typeof(IProblemBase)));
+		if (types == null)
+			return;
+		foreach (var type in types)
+		{
+			Console.WriteLine(type.Name);
+		}
+		
+	}
+}

AOC Runner/IProblemBase.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace AOC.Runner;
+public interface IProblemBase
+{
+	void LoadInput();
+
+	void CalculatePart1();
+
+	void PrintPart1();
+
+	void CalculatePart2();
+	void PrintPart2();
+}

AOC Runner/ProblemInfoAttribute.cs

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+namespace AOC.Runner;
+public class ProblemInfoAttribute : Attribute
+{
+	public int Day { get; init; }
+	public string Year { get; init; }
+	public string Name { get; init; }
+	public ProblemInfoAttribute(string year, int day, string name)
+	{
+		Year = year;
+		Day = day;
+		Name = name;
+	}
+}