diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..698e24b
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,26 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            // Use IntelliSense to find out which attributes exist for C# debugging
+            // Use hover for the description of the existing attributes
+            // For further information visit https://github.com/dotnet/vscode-csharp/blob/main/debugger-launchjson.md
+            "name": ".NET Core Launch (console)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            // If you have changed target frameworks, make sure to update the program path.
+            "program": "${workspaceFolder}/W5 D4/CancellationToken/bin/Debug/net7.0/CancellationToken.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}/W5 D4/CancellationToken",
+            // For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console
+            "console": "integratedTerminal",
+            "stopAtEntry": false
+        },
+        {
+            "name": ".NET Core Attach",
+            "type": "coreclr",
+            "request": "attach"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
new file mode 100644
index 0000000..65b475a
--- /dev/null
+++ b/.vscode/tasks.json
@@ -0,0 +1,41 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/FormulatrixBootcamp.sln",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary;ForceNoAlign"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "publish",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "publish",
+                "${workspaceFolder}/FormulatrixBootcamp.sln",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary;ForceNoAlign"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "watch",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "watch",
+                "run",
+                "--project",
+                "${workspaceFolder}/FormulatrixBootcamp.sln"
+            ],
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/FormulatrixBootcamp.sln b/FormulatrixBootcamp.sln
index 1ce6123..2c82e00 100644
--- a/FormulatrixBootcamp.sln
+++ b/FormulatrixBootcamp.sln
@@ -145,6 +145,10 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "W5 D4", "W5 D4", "{5637E846
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "CancellationToken", "W5 D4\CancellationToken\CancellationToken.csproj", "{09D51696-9994-41B5-9959-9DFD1B331B02}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "W5 D5", "W5 D5", "{A966AD2E-80DB-49E0-8070-B6DFE0C1E36D}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PreprocessingDirectives", "W5 D5\PreprocessingDirectives\PreprocessingDirectives.csproj", "{0AA3960D-7152-4FEE-B125-3C1E18FBE395}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -375,11 +379,16 @@ Global
 		{09D51696-9994-41B5-9959-9DFD1B331B02}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{09D51696-9994-41B5-9959-9DFD1B331B02}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{09D51696-9994-41B5-9959-9DFD1B331B02}.Release|Any CPU.Build.0 = Release|Any CPU
+		{0AA3960D-7152-4FEE-B125-3C1E18FBE395}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0AA3960D-7152-4FEE-B125-3C1E18FBE395}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0AA3960D-7152-4FEE-B125-3C1E18FBE395}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0AA3960D-7152-4FEE-B125-3C1E18FBE395}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
+		{0AA3960D-7152-4FEE-B125-3C1E18FBE395} = {A966AD2E-80DB-49E0-8070-B6DFE0C1E36D}
 		{09D51696-9994-41B5-9959-9DFD1B331B02} = {5637E846-0989-4572-83A1-6CBC066E2D2D}
 		{CCE2C0C8-CD08-44DA-AD87-32848B8B64A7} = {FC559EAF-E754-4775-A039-64B804F331A8}
 		{C71461E0-7028-4153-94DC-75B522D07B10} = {FC559EAF-E754-4775-A039-64B804F331A8}
diff --git a/W5 D5/PreprocessingDirectives/PreprocessingDirectives.csproj b/W5 D5/PreprocessingDirectives/PreprocessingDirectives.csproj
new file mode 100644
index 0000000..f02677b
--- /dev/null
+++ b/W5 D5/PreprocessingDirectives/PreprocessingDirectives.csproj	
@@ -0,0 +1,10 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/W5 D5/PreprocessingDirectives/Program.cs b/W5 D5/PreprocessingDirectives/Program.cs
new file mode 100644
index 0000000..018427a
--- /dev/null
+++ b/W5 D5/PreprocessingDirectives/Program.cs	
@@ -0,0 +1,16 @@
+#define DEVELOPMENT
+public class Program 
+{
+	static void Main() 
+	{
+		#if PRODUCTION
+		Console.WriteLine("Production");
+		#error "Error"
+		#elif DEVELOPMENT
+		Console.WriteLine("Development");
+		#warning "Warning"
+		#elif DEBUG
+		Console.WriteLine("Debug");
+		#endif
+	}
+}
\ No newline at end of file