diff --git a/.vscode/settings.json b/.vscode/settings.json
index 2abed56..11258b7 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,5 +1,8 @@
 {
   "editor.formatOnSave": true,
   "dotnet.defaultSolution": "../AdventOfCode2024.sln",
-  "dotnet.testWindow.useTestingPlatformProtocol": true
+  "dotnet.testWindow.useTestingPlatformProtocol": true,
+  "cSpell.words": [
+    "Fragmenter"
+  ]
 }
\ No newline at end of file
diff --git a/09/DiskFragmenter.Tests/DiskFragmenter.Tests.csproj b/09/DiskFragmenter.Tests/DiskFragmenter.Tests.csproj
new file mode 100644
index 0000000..e5b0806
--- /dev/null
+++ b/09/DiskFragmenter.Tests/DiskFragmenter.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="..\DiskFragmenter\DiskFragmenter.csproj" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <PackageReference Include="TUnit" Version="0.4.86" />
+  </ItemGroup>
+
+</Project>
diff --git a/09/DiskFragmenter/DiskFragmenter.csproj b/09/DiskFragmenter/DiskFragmenter.csproj
new file mode 100644
index 0000000..89d1400
--- /dev/null
+++ b/09/DiskFragmenter/DiskFragmenter.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="$(AssemblyName).Tests" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Include="..\INPUT.txt">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
+</Project>
diff --git a/09/DiskFragmenter/Program.cs b/09/DiskFragmenter/Program.cs
new file mode 100644
index 0000000..5f94bf8
--- /dev/null
+++ b/09/DiskFragmenter/Program.cs
@@ -0,0 +1,24 @@
+using System.Diagnostics;
+
+if (args.Length is 0)
+{
+  Console.WriteLine("Please provide a path to the input file.");
+  return;
+}
+
+if (File.Exists(args[0]) is false)
+{
+  Console.WriteLine("The provided file does not exist.");
+  return;
+}
+
+var isPart2 = args.Length is 2 && args[1] is "part2";
+var input = await File.ReadAllLinesAsync(args[0]);
+
+var stopwatch = new Stopwatch();
+stopwatch.Start();
+
+// TODO: Implement solution
+
+stopwatch.Stop();
+Console.WriteLine($". ({stopwatch.ElapsedMilliseconds}ms)");
\ No newline at end of file
diff --git a/AdventOfCode2024.sln b/AdventOfCode2024.sln
index b128eeb..ebeba76 100644
--- a/AdventOfCode2024.sln
+++ b/AdventOfCode2024.sln
@@ -66,6 +66,12 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ResonantCollinearity", "08\
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ResonantCollinearity.Tests", "08\ResonantCollinearity.Tests\ResonantCollinearity.Tests.csproj", "{4741807B-CD85-4A87-BE6E-DC506C4CD1E6}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "09", "09", "{2971DA3F-AD59-4BE1-A860-4F1B60BCB771}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DiskFragmenter", "09\DiskFragmenter\DiskFragmenter.csproj", "{EDD2A424-2BD0-408F-A32D-E5AE3316B68E}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DiskFragmenter.Tests", "09\DiskFragmenter.Tests\DiskFragmenter.Tests.csproj", "{9A7AAC2C-A23B-4FFE-8B2B-93E204904866}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -139,6 +145,14 @@ Global
 		{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
+		{EDD2A424-2BD0-408F-A32D-E5AE3316B68E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EDD2A424-2BD0-408F-A32D-E5AE3316B68E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EDD2A424-2BD0-408F-A32D-E5AE3316B68E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EDD2A424-2BD0-408F-A32D-E5AE3316B68E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{9A7AAC2C-A23B-4FFE-8B2B-93E204904866}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9A7AAC2C-A23B-4FFE-8B2B-93E204904866}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9A7AAC2C-A23B-4FFE-8B2B-93E204904866}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9A7AAC2C-A23B-4FFE-8B2B-93E204904866}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{1AFE2FF1-A55D-4D86-A9BB-9875CA0D14D8} = {270B7829-6D23-4B34-91FE-D87D533AF2AB}
@@ -157,5 +171,7 @@ Global
 		{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}
+		{EDD2A424-2BD0-408F-A32D-E5AE3316B68E} = {2971DA3F-AD59-4BE1-A860-4F1B60BCB771}
+		{9A7AAC2C-A23B-4FFE-8B2B-93E204904866} = {2971DA3F-AD59-4BE1-A860-4F1B60BCB771}
 	EndGlobalSection
 EndGlobal