diff --git a/AdventOfCode2017.Tests/AdventOfCode2017.Tests.csproj b/AdventOfCode2017.Tests/AdventOfCode2017.Tests.csproj
index f919ddc..9673bc3 100644
--- a/AdventOfCode2017.Tests/AdventOfCode2017.Tests.csproj
+++ b/AdventOfCode2017.Tests/AdventOfCode2017.Tests.csproj
@@ -1,107 +1,20 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="15.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="..\packages\MSTest.TestAdapter.1.3.2\build\net45\MSTest.TestAdapter.props" Condition="Exists('..\packages\MSTest.TestAdapter.1.3.2\build\net45\MSTest.TestAdapter.props')" />
+<Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{3537CE59-1C57-481B-85F7-3F2A1F0EDE1D}</ProjectGuid>
-    <OutputType>Library</OutputType>
-    <AppDesignerFolder>Properties</AppDesignerFolder>
-    <RootNamespace>AdventOfCode2017.Tests</RootNamespace>
-    <AssemblyName>AdventOfCode2017.Tests</AssemblyName>
-    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
-    <FileAlignment>512</FileAlignment>
-    <ProjectTypeGuids>{3AC096D0-A1C2-E12C-1390-A8335801FDAB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
-    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">10.0</VisualStudioVersion>
-    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
-    <ReferencePath>$(ProgramFiles)\Common Files\microsoft shared\VSTT\$(VisualStudioVersion)\UITestExtensionPackages</ReferencePath>
-    <IsCodedUITest>False</IsCodedUITest>
-    <TestProjectType>UnitTest</TestProjectType>
-    <TargetFrameworkProfile />
-    <NuGetPackageImportStamp>
-    </NuGetPackageImportStamp>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
-    <Optimize>false</Optimize>
-    <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
+    <TargetFramework>net7.0</TargetFramework>
+
+    <IsPackable>false</IsPackable>
   </PropertyGroup>
+
   <ItemGroup>
-    <Reference Include="Microsoft.VisualStudio.TestPlatform.TestFramework, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>..\packages\MSTest.TestFramework.1.3.2\lib\net45\Microsoft.VisualStudio.TestPlatform.TestFramework.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.VisualStudio.TestPlatform.TestFramework.Extensions, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>..\packages\MSTest.TestFramework.1.3.2\lib\net45\Microsoft.VisualStudio.TestPlatform.TestFramework.Extensions.dll</HintPath>
-    </Reference>
-    <Reference Include="System" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
+    <PackageReference Include="MSTest.TestAdapter" Version="2.1.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="2.1.1" />
+    <PackageReference Include="coverlet.collector" Version="1.3.0" />
   </ItemGroup>
-  <Choose>
-    <When Condition="('$(VisualStudioVersion)' == '10.0' or '$(VisualStudioVersion)' == '') and '$(TargetFrameworkVersion)' == 'v3.5'">
-      <ItemGroup>
-        <Reference Include="Microsoft.VisualStudio.QualityTools.UnitTestFramework, Version=10.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />
-      </ItemGroup>
-    </When>
-    <Otherwise />
-  </Choose>
+
   <ItemGroup>
-    <Compile Include="Day01_Tests.cs" />
-    <Compile Include="Day02_Tests.cs" />
-    <Compile Include="Properties\AssemblyInfo.cs" />
+    <ProjectReference Include="..\AdventOfCode2017\AdventOfCode2017.csproj" />
   </ItemGroup>
-  <ItemGroup>
-    <None Include="packages.config" />
-  </ItemGroup>
-  <ItemGroup>
-    <ProjectReference Include="..\AdventOfCode2017\AdventOfCode2017.csproj">
-      <Project>{49C8A67C-D94C-4CFB-B7FB-C19A1A83CA66}</Project>
-      <Name>AdventOfCode2017</Name>
-    </ProjectReference>
-  </ItemGroup>
-  <Choose>
-    <When Condition="'$(VisualStudioVersion)' == '10.0' And '$(IsCodedUITest)' == 'True'">
-      <ItemGroup>
-        <Reference Include="Microsoft.VisualStudio.QualityTools.CodedUITestFramework, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-          <Private>False</Private>
-        </Reference>
-        <Reference Include="Microsoft.VisualStudio.TestTools.UITest.Common, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-          <Private>False</Private>
-        </Reference>
-        <Reference Include="Microsoft.VisualStudio.TestTools.UITest.Extension, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-          <Private>False</Private>
-        </Reference>
-        <Reference Include="Microsoft.VisualStudio.TestTools.UITesting, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-          <Private>False</Private>
-        </Reference>
-      </ItemGroup>
-    </When>
-  </Choose>
-  <Import Project="$(VSToolsPath)\TeamTest\Microsoft.TestTools.targets" Condition="Exists('$(VSToolsPath)\TeamTest\Microsoft.TestTools.targets')" />
-  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
-    <PropertyGroup>
-      <ErrorText>Este proyecto hace referencia a los paquetes NuGet que faltan en este equipo. Use la restauración de paquetes NuGet para descargarlos. Para obtener más información, consulte http://go.microsoft.com/fwlink/?LinkID=322105. El archivo que falta es {0}.</ErrorText>
-    </PropertyGroup>
-    <Error Condition="!Exists('..\packages\MSTest.TestAdapter.1.3.2\build\net45\MSTest.TestAdapter.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\MSTest.TestAdapter.1.3.2\build\net45\MSTest.TestAdapter.props'))" />
-    <Error Condition="!Exists('..\packages\MSTest.TestAdapter.1.3.2\build\net45\MSTest.TestAdapter.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\MSTest.TestAdapter.1.3.2\build\net45\MSTest.TestAdapter.targets'))" />
-  </Target>
-  <Import Project="..\packages\MSTest.TestAdapter.1.3.2\build\net45\MSTest.TestAdapter.targets" Condition="Exists('..\packages\MSTest.TestAdapter.1.3.2\build\net45\MSTest.TestAdapter.targets')" />
-  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
-       Other similar extension points exist, see Microsoft.Common.targets.
-  <Target Name="BeforeBuild">
-  </Target>
-  <Target Name="AfterBuild">
-  </Target>
-  -->
-</Project>
\ No newline at end of file
+
+</Project>
diff --git a/AdventOfCode2017.Tests/Properties/AssemblyInfo.cs b/AdventOfCode2017.Tests/Properties/AssemblyInfo.cs
deleted file mode 100644
index 3f2563a..0000000
--- a/AdventOfCode2017.Tests/Properties/AssemblyInfo.cs
+++ /dev/null
@@ -1,36 +0,0 @@
-using System.Reflection;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-
-// La información general de un ensamblado se controla mediante el siguiente 
-// conjunto de atributos. Cambie estos valores de atributo para modificar la información
-// asociada con un ensamblado.
-[assembly: AssemblyTitle("AdventOfCode2017.Tests")]
-[assembly: AssemblyDescription("")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("")]
-[assembly: AssemblyProduct("AdventOfCode2017.Tests")]
-[assembly: AssemblyCopyright("Copyright ©  2018")]
-[assembly: AssemblyTrademark("")]
-[assembly: AssemblyCulture("")]
-
-// Si establece ComVisible en false, los tipos de este ensamblado no estarán visibles 
-// para los componentes COM.  Si es necesario obtener acceso a un tipo en este ensamblado desde 
-// COM, establezca el atributo ComVisible en true en este tipo.
-[assembly: ComVisible(false)]
-
-// El siguiente GUID sirve como id. de typelib si este proyecto se expone a COM.
-[assembly: Guid("3537ce59-1c57-481b-85f7-3f2a1f0ede1d")]
-
-// La información de versión de un ensamblado consta de los cuatro valores siguientes:
-//
-//      Versión principal
-//      Versión secundaria 
-//      Número de compilación
-//      Revisión
-//
-// Puede especificar todos los valores o usar los valores predeterminados de número de compilación y de revisión 
-// mediante el carácter '*', como se muestra a continuación:
-//[assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.0.0")]
-[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/AdventOfCode2017/AdventOfCode2017.csproj b/AdventOfCode2017/AdventOfCode2017.csproj
index decaf19..efc033b 100644
--- a/AdventOfCode2017/AdventOfCode2017.csproj
+++ b/AdventOfCode2017/AdventOfCode2017.csproj
@@ -1,62 +1,14 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+<Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{49C8A67C-D94C-4CFB-B7FB-C19A1A83CA66}</ProjectGuid>
     <OutputType>Exe</OutputType>
-    <RootNamespace>AdventOfCode2017</RootNamespace>
-    <AssemblyName>AdventOfCode2017</AssemblyName>
-    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
-    <FileAlignment>512</FileAlignment>
-    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
-    <Deterministic>true</Deterministic>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <PlatformTarget>AnyCPU</PlatformTarget>
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
-    <Optimize>false</Optimize>
-    <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <PlatformTarget>AnyCPU</PlatformTarget>
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
+    <TargetFramework>net7.0</TargetFramework>
   </PropertyGroup>
+
   <ItemGroup>
-    <Reference Include="System" />
-    <Reference Include="System.Core" />
-    <Reference Include="System.Xml.Linq" />
-    <Reference Include="System.Data.DataSetExtensions" />
-    <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System.Data" />
-    <Reference Include="System.Net.Http" />
-    <Reference Include="System.Xml" />
-  </ItemGroup>
-  <ItemGroup>
-    <Compile Include="Day01.cs" />
-    <Compile Include="Day02.cs" />
-    <Compile Include="Day03.cs" />
-    <Compile Include="IDay.cs" />
-    <Compile Include="Program.cs" />
-    <Compile Include="Properties\AssemblyInfo.cs" />
-  </ItemGroup>
-  <ItemGroup>
-    <Content Include="inputs\Day01.txt">
+    <None Update="inputs\*">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day02.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
+    </None>
   </ItemGroup>
-  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-</Project>
\ No newline at end of file
+
+</Project>
diff --git a/AdventOfCode2017/Properties/AssemblyInfo.cs b/AdventOfCode2017/Properties/AssemblyInfo.cs
deleted file mode 100644
index 7593549..0000000
--- a/AdventOfCode2017/Properties/AssemblyInfo.cs
+++ /dev/null
@@ -1,15 +0,0 @@
-using System.Reflection;
-using System.Runtime.InteropServices;
-
-[assembly: AssemblyTitle("AdventOfCode2017")]
-[assembly: AssemblyDescription("")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("")]
-[assembly: AssemblyProduct("AdventOfCode2017")]
-[assembly: AssemblyCopyright("Copyright © Valeriano A.R. 2018")]
-[assembly: AssemblyTrademark("")]
-[assembly: AssemblyCulture("")]
-
-[assembly: ComVisible(false)]
-[assembly: Guid("49c8a67c-d94c-4cfb-b7fb-c19a1a83ca66")]
-[assembly: AssemblyFileVersion("1.0.0")]
diff --git a/AdventOfCode2018.Tests/AdventOfCode2018.Tests.csproj b/AdventOfCode2018.Tests/AdventOfCode2018.Tests.csproj
index ef21ad3..67924a4 100644
--- a/AdventOfCode2018.Tests/AdventOfCode2018.Tests.csproj
+++ b/AdventOfCode2018.Tests/AdventOfCode2018.Tests.csproj
@@ -1,126 +1,20 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="15.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="..\packages\MSTest.TestAdapter.1.4.0\build\net45\MSTest.TestAdapter.props" Condition="Exists('..\packages\MSTest.TestAdapter.1.4.0\build\net45\MSTest.TestAdapter.props')" />
+<Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{EE35694D-97C1-485D-9FFE-73912FA97446}</ProjectGuid>
-    <OutputType>Library</OutputType>
-    <AppDesignerFolder>Properties</AppDesignerFolder>
-    <RootNamespace>AdventOfCode2018Tests</RootNamespace>
-    <AssemblyName>AdventOfCode2018Tests</AssemblyName>
-    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
-    <FileAlignment>512</FileAlignment>
-    <ProjectTypeGuids>{3AC096D0-A1C2-E12C-1390-A8335801FDAB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
-    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">10.0</VisualStudioVersion>
-    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
-    <ReferencePath>$(ProgramFiles)\Common Files\microsoft shared\VSTT\$(VisualStudioVersion)\UITestExtensionPackages</ReferencePath>
-    <IsCodedUITest>False</IsCodedUITest>
-    <TestProjectType>UnitTest</TestProjectType>
-    <TargetFrameworkProfile />
-    <NuGetPackageImportStamp>
-    </NuGetPackageImportStamp>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
-    <Optimize>false</Optimize>
-    <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
+    <TargetFramework>net7.0</TargetFramework>
+
+    <IsPackable>false</IsPackable>
   </PropertyGroup>
+
   <ItemGroup>
-    <Reference Include="Microsoft.VisualStudio.TestPlatform.TestFramework, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>..\packages\MSTest.TestFramework.1.4.0\lib\net45\Microsoft.VisualStudio.TestPlatform.TestFramework.dll</HintPath>
-    </Reference>
-    <Reference Include="Microsoft.VisualStudio.TestPlatform.TestFramework.Extensions, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-      <HintPath>..\packages\MSTest.TestFramework.1.4.0\lib\net45\Microsoft.VisualStudio.TestPlatform.TestFramework.Extensions.dll</HintPath>
-    </Reference>
-    <Reference Include="System" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
+    <PackageReference Include="MSTest.TestAdapter" Version="2.1.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="2.1.1" />
+    <PackageReference Include="coverlet.collector" Version="1.3.0" />
   </ItemGroup>
-  <Choose>
-    <When Condition="('$(VisualStudioVersion)' == '10.0' or '$(VisualStudioVersion)' == '') and '$(TargetFrameworkVersion)' == 'v3.5'">
-      <ItemGroup>
-        <Reference Include="Microsoft.VisualStudio.QualityTools.UnitTestFramework, Version=10.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" />
-      </ItemGroup>
-    </When>
-    <Otherwise />
-  </Choose>
+
   <ItemGroup>
-    <Compile Include="ChronoLicenceNode_Tests.cs" />
-    <Compile Include="ChronoPoint_Tests.cs" />
-    <Compile Include="Claim_Tests.cs" />
-    <Compile Include="Day01_Tests.cs" />
-    <Compile Include="Day02_Tests.cs" />
-    <Compile Include="Day03_Tests.cs" />
-    <Compile Include="Day04_Tests.cs" />
-    <Compile Include="Day05_Tests.cs" />
-    <Compile Include="Day06_Tests.cs" />
-    <Compile Include="Day07_Tests.cs" />
-    <Compile Include="Day08_Tests.cs" />
-    <Compile Include="Day09_Tests.cs" />
-    <Compile Include="Day10_Tests.cs" />
-    <Compile Include="Day11_Tests.cs" />
-    <Compile Include="Day12_Tests.cs" />
-    <Compile Include="Day13_Tests.cs" />
-    <Compile Include="Day14_Tests.cs" />
-    <Compile Include="Day15_Tests.cs" />
-    <Compile Include="Day23_Tests.cs" />
-    <Compile Include="GuardEvent_Tests.cs" />
-    <Compile Include="MarbleGame_Tests.cs" />
-    <Compile Include="Properties\AssemblyInfo.cs" />
+    <ProjectReference Include="..\AdventOfCode2018\AdventOfCode2018.csproj" />
   </ItemGroup>
-  <ItemGroup>
-    <None Include="packages.config" />
-  </ItemGroup>
-  <ItemGroup>
-    <ProjectReference Include="..\AdventOfCode2018\AdventOfCode2018.csproj">
-      <Project>{43DAF84F-369A-48C5-9292-536094336F8F}</Project>
-      <Name>AdventOfCode2018</Name>
-    </ProjectReference>
-  </ItemGroup>
-  <Choose>
-    <When Condition="'$(VisualStudioVersion)' == '10.0' And '$(IsCodedUITest)' == 'True'">
-      <ItemGroup>
-        <Reference Include="Microsoft.VisualStudio.QualityTools.CodedUITestFramework, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-          <Private>False</Private>
-        </Reference>
-        <Reference Include="Microsoft.VisualStudio.TestTools.UITest.Common, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-          <Private>False</Private>
-        </Reference>
-        <Reference Include="Microsoft.VisualStudio.TestTools.UITest.Extension, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-          <Private>False</Private>
-        </Reference>
-        <Reference Include="Microsoft.VisualStudio.TestTools.UITesting, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
-          <Private>False</Private>
-        </Reference>
-      </ItemGroup>
-    </When>
-  </Choose>
-  <Import Project="$(VSToolsPath)\TeamTest\Microsoft.TestTools.targets" Condition="Exists('$(VSToolsPath)\TeamTest\Microsoft.TestTools.targets')" />
-  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
-    <PropertyGroup>
-      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
-    </PropertyGroup>
-    <Error Condition="!Exists('..\packages\MSTest.TestAdapter.1.4.0\build\net45\MSTest.TestAdapter.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\MSTest.TestAdapter.1.4.0\build\net45\MSTest.TestAdapter.props'))" />
-    <Error Condition="!Exists('..\packages\MSTest.TestAdapter.1.4.0\build\net45\MSTest.TestAdapter.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\MSTest.TestAdapter.1.4.0\build\net45\MSTest.TestAdapter.targets'))" />
-  </Target>
-  <Import Project="..\packages\MSTest.TestAdapter.1.4.0\build\net45\MSTest.TestAdapter.targets" Condition="Exists('..\packages\MSTest.TestAdapter.1.4.0\build\net45\MSTest.TestAdapter.targets')" />
-  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
-       Other similar extension points exist, see Microsoft.Common.targets.
-  <Target Name="BeforeBuild">
-  </Target>
-  <Target Name="AfterBuild">
-  </Target>
-  -->
-</Project>
\ No newline at end of file
+
+</Project>
diff --git a/AdventOfCode2018.Tests/Properties/AssemblyInfo.cs b/AdventOfCode2018.Tests/Properties/AssemblyInfo.cs
deleted file mode 100644
index ee2b80e..0000000
--- a/AdventOfCode2018.Tests/Properties/AssemblyInfo.cs
+++ /dev/null
@@ -1,36 +0,0 @@
-using System.Reflection;
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
-
-// General Information about an assembly is controlled through the following 
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
-[assembly: AssemblyTitle("AdventOfCode2018Tests")]
-[assembly: AssemblyDescription("")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("")]
-[assembly: AssemblyProduct("AdventOfCode2018Tests")]
-[assembly: AssemblyCopyright("Copyright ©  2018")]
-[assembly: AssemblyTrademark("")]
-[assembly: AssemblyCulture("")]
-
-// Setting ComVisible to false makes the types in this assembly not visible 
-// to COM components.  If you need to access a type in this assembly from 
-// COM, set the ComVisible attribute to true on that type.
-[assembly: ComVisible(false)]
-
-// The following GUID is for the ID of the typelib if this project is exposed to COM
-[assembly: Guid("ee35694d-97c1-485d-9ffe-73912fa97446")]
-
-// Version information for an assembly consists of the following four values:
-//
-//      Major Version
-//      Minor Version 
-//      Build Number
-//      Revision
-//
-// You can specify all the values or you can default the Build and Revision Numbers 
-// by using the '*' as shown below:
-// [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.0.0.0")]
-[assembly: AssemblyFileVersion("1.0.0.0")]
diff --git a/AdventOfCode2018/AdventOfCode2018.csproj b/AdventOfCode2018/AdventOfCode2018.csproj
index b12c590..efc033b 100644
--- a/AdventOfCode2018/AdventOfCode2018.csproj
+++ b/AdventOfCode2018/AdventOfCode2018.csproj
@@ -1,117 +1,14 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+<Project Sdk="Microsoft.NET.Sdk">
+
   <PropertyGroup>
-    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
-    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
-    <ProjectGuid>{43DAF84F-369A-48C5-9292-536094336F8F}</ProjectGuid>
     <OutputType>Exe</OutputType>
-    <RootNamespace>AdventOfCode2018</RootNamespace>
-    <AssemblyName>AdventOfCode2018</AssemblyName>
-    <TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>
-    <FileAlignment>512</FileAlignment>
-    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
-    <Deterministic>true</Deterministic>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
-    <PlatformTarget>AnyCPU</PlatformTarget>
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>full</DebugType>
-    <Optimize>false</Optimize>
-    <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <PlatformTarget>AnyCPU</PlatformTarget>
-    <DebugType>pdbonly</DebugType>
-    <Optimize>true</Optimize>
-    <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
-    <ErrorReport>prompt</ErrorReport>
-    <WarningLevel>4</WarningLevel>
+    <TargetFramework>net7.0</TargetFramework>
   </PropertyGroup>
+
   <ItemGroup>
-    <Reference Include="System" />
-    <Reference Include="System.Core" />
-    <Reference Include="System.Xml.Linq" />
-    <Reference Include="System.Data.DataSetExtensions" />
-    <Reference Include="Microsoft.CSharp" />
-    <Reference Include="System.Data" />
-    <Reference Include="System.Net.Http" />
-    <Reference Include="System.Xml" />
+    <None Update="inputs\*">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
   </ItemGroup>
-  <ItemGroup>
-    <Compile Include="Day01.cs" />
-    <Compile Include="Day02.cs" />
-    <Compile Include="Day03.cs" />
-    <Compile Include="Day04.cs" />
-    <Compile Include="Day05.cs" />
-    <Compile Include="Day06.cs" />
-    <Compile Include="Day07.cs" />
-    <Compile Include="Day08.cs" />
-    <Compile Include="Day09.cs" />
-    <Compile Include="Day10.cs" />
-    <Compile Include="Day11.cs" />
-    <Compile Include="Day12.cs" />
-    <Compile Include="Day13.cs" />
-    <Compile Include="Day14.cs" />
-    <Compile Include="Day15.cs" />
-    <Compile Include="Day23.cs" />
-    <Compile Include="IDay.cs" />
-    <Compile Include="Program.cs" />
-    <Compile Include="Properties\AssemblyInfo.cs" />
-  </ItemGroup>
-  <ItemGroup>
-    <Content Include="inputs\Day01.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day02.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day03.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day04.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day05.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day06.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day07.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day08.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day09.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day11.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day10.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day12.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day15.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day14.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day23.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-    <Content Include="inputs\Day13.txt">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-  </ItemGroup>
-  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-</Project>
\ No newline at end of file
+
+</Project>
diff --git a/AdventOfCode2018/Properties/AssemblyInfo.cs b/AdventOfCode2018/Properties/AssemblyInfo.cs
deleted file mode 100644
index 8c0f0bf..0000000
--- a/AdventOfCode2018/Properties/AssemblyInfo.cs
+++ /dev/null
@@ -1,15 +0,0 @@
-using System.Reflection;
-using System.Runtime.InteropServices;
-
-[assembly: AssemblyTitle("AdventOfCode2018")]
-[assembly: AssemblyDescription("")]
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("")]
-[assembly: AssemblyProduct("AdventOfCode2018")]
-[assembly: AssemblyCopyright("Copyright © Valeriano A.R. 2018")]
-[assembly: AssemblyTrademark("")]
-[assembly: AssemblyCulture("")]
-
-[assembly: ComVisible(false)]
-[assembly: Guid("43daf84f-369a-48c5-9292-536094336f8f")]
-[assembly: AssemblyFileVersion("1.0.0")]
diff --git a/AdventOfCode2020.Tests/AdventOfCode2020.Tests.csproj b/AdventOfCode2020.Tests/AdventOfCode2020.Tests.csproj
index 4c20deb..4d5461f 100644
--- a/AdventOfCode2020.Tests/AdventOfCode2020.Tests.csproj
+++ b/AdventOfCode2020.Tests/AdventOfCode2020.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net5.0</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
 
     <IsPackable>false</IsPackable>
   </PropertyGroup>
diff --git a/AdventOfCode2020/AdventOfCode2020.csproj b/AdventOfCode2020/AdventOfCode2020.csproj
index 69384b9..e311662 100644
--- a/AdventOfCode2020/AdventOfCode2020.csproj
+++ b/AdventOfCode2020/AdventOfCode2020.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net5.0</TargetFramework>
+    <TargetFramework>net7.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>