diff --git a/.idea/.idea.AdventOfCode2024/.idea/indexLayout.xml b/.idea/.idea.AdventOfCode2024/.idea/indexLayout.xml
index 81379ac..d1c08f7 100644
--- a/.idea/.idea.AdventOfCode2024/.idea/indexLayout.xml
+++ b/.idea/.idea.AdventOfCode2024/.idea/indexLayout.xml
@@ -12,6 +12,7 @@
       <Path>04/PROBLEM.md</Path>
       <Path>05/PROBLEM.md</Path>
       <Path>06</Path>
+      <Path>08</Path>
       <Path>README.md</Path>
     </explicitIncludes>
     <explicitExcludes />
diff --git a/06/GuardGallivant/Map.cs b/06/GuardGallivant/Map.cs
index 2529d0e..747280a 100644
--- a/06/GuardGallivant/Map.cs
+++ b/06/GuardGallivant/Map.cs
@@ -19,12 +19,6 @@ class Map
     _input = input;
   }
   
-  // TODO: This can be optimized I think.
-  // Right now I'm basically doing a flood fill...I think
-  // I'm finding all the places on the map where I can
-  // place the obstruction, placing, and then seeing if
-  // a loop is created when guard patrols map.
-  // IDEA: Only check places on the guard's path
   public int IdentifyNumberOfPlacementsForNewObstruction()
   {
     var count = 0;
diff --git a/08/ResonantCollinearity.Tests/ResonantCollinearity.Tests.csproj b/08/ResonantCollinearity.Tests/ResonantCollinearity.Tests.csproj
new file mode 100644
index 0000000..2aee005
--- /dev/null
+++ b/08/ResonantCollinearity.Tests/ResonantCollinearity.Tests.csproj
@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <NoWarn>CA1822</NoWarn>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ResonantCollinearity\ResonantCollinearity.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="TUnit" Version="0.4.86" />
+  </ItemGroup>
+
+</Project>
diff --git a/08/ResonantCollinearity/Program.cs b/08/ResonantCollinearity/Program.cs
new file mode 100644
index 0000000..5f94bf8
--- /dev/null
+++ b/08/ResonantCollinearity/Program.cs
@@ -0,0 +1,24 @@
+using System.Diagnostics;
+
+if (args.Length is 0)
+{
+  Console.WriteLine("Please provide a path to the input file.");
+  return;
+}
+
+if (File.Exists(args[0]) is false)
+{
+  Console.WriteLine("The provided file does not exist.");
+  return;
+}
+
+var isPart2 = args.Length is 2 && args[1] is "part2";
+var input = await File.ReadAllLinesAsync(args[0]);
+
+var stopwatch = new Stopwatch();
+stopwatch.Start();
+
+// TODO: Implement solution
+
+stopwatch.Stop();
+Console.WriteLine($". ({stopwatch.ElapsedMilliseconds}ms)");
\ No newline at end of file
diff --git a/08/ResonantCollinearity/ResonantCollinearity.csproj b/08/ResonantCollinearity/ResonantCollinearity.csproj
new file mode 100644
index 0000000..ade7612
--- /dev/null
+++ b/08/ResonantCollinearity/ResonantCollinearity.csproj
@@ -0,0 +1,21 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <NoWarn>CA1822</NoWarn>
+  </PropertyGroup>
+  
+  <ItemGroup>
+    <InternalsVisibleTo Include="$(AssemblyName).Tests" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Include="..\INPUT.txt">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+  
+</Project>
diff --git a/AdventOfCode2024.sln b/AdventOfCode2024.sln
index 5d8452f..b128eeb 100644
--- a/AdventOfCode2024.sln
+++ b/AdventOfCode2024.sln
@@ -60,6 +60,12 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BridgeRepair", "07\BridgeRe
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BridgeRepair.Tests", "07\BridgeRepair.Tests\BridgeRepair.Tests.csproj", "{23C9756E-F2F4-44CA-B38A-DB92782D7858}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "08", "08", "{F2A51E88-BCCC-4778-9369-63E72D052554}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ResonantCollinearity", "08\ResonantCollinearity\ResonantCollinearity.csproj", "{425DF10B-4621-4882-935A-0320F1C4B6DD}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ResonantCollinearity.Tests", "08\ResonantCollinearity.Tests\ResonantCollinearity.Tests.csproj", "{4741807B-CD85-4A87-BE6E-DC506C4CD1E6}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -125,6 +131,14 @@ Global
 		{23C9756E-F2F4-44CA-B38A-DB92782D7858}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{23C9756E-F2F4-44CA-B38A-DB92782D7858}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{23C9756E-F2F4-44CA-B38A-DB92782D7858}.Release|Any CPU.Build.0 = Release|Any CPU
+		{425DF10B-4621-4882-935A-0320F1C4B6DD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{425DF10B-4621-4882-935A-0320F1C4B6DD}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{425DF10B-4621-4882-935A-0320F1C4B6DD}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{425DF10B-4621-4882-935A-0320F1C4B6DD}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4741807B-CD85-4A87-BE6E-DC506C4CD1E6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4741807B-CD85-4A87-BE6E-DC506C4CD1E6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4741807B-CD85-4A87-BE6E-DC506C4CD1E6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4741807B-CD85-4A87-BE6E-DC506C4CD1E6}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{1AFE2FF1-A55D-4D86-A9BB-9875CA0D14D8} = {270B7829-6D23-4B34-91FE-D87D533AF2AB}
@@ -141,5 +155,7 @@ Global
 		{F76B41EB-C479-437E-A98B-137A237E2B71} = {293B49F7-594F-4F27-B018-A732820FB797}
 		{C9D192EE-0384-4875-BB32-54F7168D6C3C} = {73EE2FA2-6417-4518-9790-72D4F2B62CAF}
 		{23C9756E-F2F4-44CA-B38A-DB92782D7858} = {73EE2FA2-6417-4518-9790-72D4F2B62CAF}
+		{425DF10B-4621-4882-935A-0320F1C4B6DD} = {F2A51E88-BCCC-4778-9369-63E72D052554}
+		{4741807B-CD85-4A87-BE6E-DC506C4CD1E6} = {F2A51E88-BCCC-4778-9369-63E72D052554}
 	EndGlobalSection
 EndGlobal